build: support Node.js 12.x

Author: dougwilson

.travis.yml

@@ -13,6 +13,7 @@ node_js:
   - "9.11"
   - "10.15"
   - "11.15"
+  - "12.2"
 sudo: false
 cache:
   directories:

README.md

@@ -276,7 +276,7 @@ The current lead maintainer is [Douglas Christopher Wilson](https://github.com/d
   - Connect `1.x` - node `0.4`
   - Connect `< 2.8` - node `0.6`
   - Connect `>= 2.8 < 3` - node `0.8`
-  - Connect `>= 3` - node `0.10`, `0.12`, `4.x`, `5.x`, `6.x`, `7.x`, `8.x`, `9.x`, `10.x`, `11.x`; io.js `1.x`, `2.x`, `3.x`
+  - Connect `>= 3` - node `0.10`, `0.12`, `4.x`, `5.x`, `6.x`, `7.x`, `8.x`, `9.x`, `10.x`, `11.x`, `12.x`; io.js `1.x`, `2.x`, `3.x`
 
 ## License