npm run mocha

It seems the problem of the version of babel-xxx. But I just can solve it, maybe who can help me 😂, thx.

```shell
npm run mocha
```

error output:

```shell
> javascript-problems-and-solutions@2.0.1 mocha /Users/mac/Downloads/play_catch/javascript-problems-and-solutions
> cross-env NODE_ENV=test ./node_modules/.bin/nyc mocha ./src/**/*$FILE*-test.js

/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:72
  throw Object.assign(err, {
  ^

Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel.
    at throwVersionError (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:65:11)
    at Object.assertVersion (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:13:11)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-plugin-istanbul@5.2.0@babel-plugin-istanbul/lib/index.js:68:7
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:19:12
    at Function.memoisePluginContainer (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:113:13)
    at Function.normalisePlugin (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:146:32)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:184:30
    at Array.map (<anonymous>)
    at Function.normalisePlugins (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:158:20)
    at OptionManager.mergeOptions (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:234:36)
    at OptionManager.init (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:368:12)
    at compile (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:103:45)
    at loader (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:144:14)
    at require.extensions.<computed> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:154:7)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:250:27
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:247:14)
    at Mocha.run (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:576:10)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/bin/_mocha:637:18)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Module.replacementCompile (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:58:13)
    at Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4
    at require.extensions.<computed> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:152:7)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at runMain (/Users/mac/.node-spawn-wrap-55539-79d3b4bf85d8/node:68:10)
    at Function.<anonymous> (/Users/mac/.node-spawn-wrap-55539-79d3b4bf85d8/node:171:5)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/bin/wrap.js:23:4)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at /Users/mac/.node-spawn-wrap-55539-79d3b4bf85d8/node:178:8
    at Object.<anonymous> (/Users/mac/.node-spawn-wrap-55539-79d3b4bf85d8/node:181:3)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47 {
  code: 'BABEL_VERSION_UNSUPPORTED',
  version: '6.26.3',
  range: '^7.0.0-0'
}
----------|----------|----------|----------|----------|-------------------|
File      |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
----------|----------|----------|----------|----------|-------------------|
All files |        0 |        0 |        0 |        0 |                   |
----------|----------|----------|----------|----------|-------------------|
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! javascript-problems-and-solutions@2.0.1 mocha: `cross-env NODE_ENV=test ./node_modules/.bin/nyc mocha ./src/**/*$FILE*-test.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the javascript-problems-and-solutions@2.0.1 mocha script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/mac/.npm/_logs/2020-03-31T05_35_08_282Z-debug.log
 ✘ RandomYang  ~/Downloads/play_catch/javascript-problems-and-solutions   master ●  npm run mocha >> output.txt
/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:72
  throw Object.assign(err, {
  ^

Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel.
    at throwVersionError (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:65:11)
    at Object.assertVersion (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:13:11)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-plugin-istanbul@5.2.0@babel-plugin-istanbul/lib/index.js:68:7
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_@babel_helper-plugin-utils@7.8.3@@babel/helper-plugin-utils/lib/index.js:19:12
    at Function.memoisePluginContainer (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:113:13)
    at Function.normalisePlugin (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:146:32)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:184:30
    at Array.map (<anonymous>)
    at Function.normalisePlugins (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:158:20)
    at OptionManager.mergeOptions (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:234:36)
    at OptionManager.init (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-core@6.26.3@babel-core/lib/transformation/file/options/option-manager.js:368:12)
    at compile (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:103:45)
    at loader (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:144:14)
    at require.extensions.<computed> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:154:7)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:250:27
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:247:14)
    at Mocha.run (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/lib/mocha.js:576:10)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_mocha@5.2.0@mocha/bin/_mocha:637:18)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Module.replacementCompile (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:58:13)
    at Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at /Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4
    at require.extensions.<computed> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_babel-register@6.26.0@babel-register/lib/node.js:152:7)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/node_modules/append-transform/index.js:62:4)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at runMain (/Users/mac/.node-spawn-wrap-55735-b4037327ec73/node:68:10)
    at Function.<anonymous> (/Users/mac/.node-spawn-wrap-55735-b4037327ec73/node:171:5)
    at Object.<anonymous> (/Users/mac/Downloads/play_catch/javascript-problems-and-solutions/node_modules/_nyc@13.3.0@nyc/bin/wrap.js:23:4)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at /Users/mac/.node-spawn-wrap-55735-b4037327ec73/node:178:8
    at Object.<anonymous> (/Users/mac/.node-spawn-wrap-55735-b4037327ec73/node:181:3)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47 {
  code: 'BABEL_VERSION_UNSUPPORTED',
  version: '6.26.3',
  range: '^7.0.0-0'
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! javascript-problems-and-solutions@2.0.1 mocha: `cross-env NODE_ENV=test ./node_modules/.bin/nyc mocha ./src/**/*$FILE*-test.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the javascript-problems-and-solutions@2.0.1 mocha script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/mac/.npm/_logs/2020-03-31T05_36_12_260Z-debug.log
```

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npm run mocha #343

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Metadata

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