added missing export 'isContextConsumer' in rollup config

Author: stefan.hausmann

rollup.config.js

@@ -2,7 +2,7 @@ import nodeResolve from 'rollup-plugin-node-resolve'
 import babel from 'rollup-plugin-babel'
 import replace from 'rollup-plugin-replace'
 import commonjs from 'rollup-plugin-commonjs'
-import {uglify} from 'rollup-plugin-uglify'
+import { uglify } from 'rollup-plugin-uglify'
 import pkg from './package.json'
 
 const env = process.env.NODE_ENV
@@ -22,14 +22,17 @@ const config = {
     nodeResolve(),
     babel({
       exclude: '**/node_modules/**',
-      runtimeHelpers: true,
+      runtimeHelpers: true
     }),
     replace({
       'process.env.NODE_ENV': JSON.stringify(env)
     }),
     commonjs({
       namedExports: {
-        'node_modules/react-is/index.js': ['isValidElementType'],
+        'node_modules/react-is/index.js': [
+          'isValidElementType',
+          'isContextConsumer'
+        ]
       }
     })
   ]