[7.0] Remove node 0.10, 0.12 and 5 from Travis (#284)

* Remove node 0.10, 0.12 and 5 from Travis

* add engines to package.json

.travis.yml

@@ -1,24 +1,14 @@
 sudo: false
 language: node_js
 node_js:
-  - "0.10"
-  - "0.12"
   - "4"
-  - "5"
   - "6"
   - "7"
 
-before_install:
-    # Rollup doesn't support node < 4.x. Switch to latest for build
-  - . $HOME/.nvm/nvm.sh
-  - nvm install stable && nvm use stable
-
 before_script:
   - 'if [ -n "${BABEL-}" ]; then make bootstrap-babel ; fi'
   - 'if [ -n "${FLOWTESTS-}" ]; then make bootstrap-flow ; fi'
   - 'BABEL_ENV=test npm run build'
-    # Switch back to node version currently being tested prior to test run
-  - 'nvm use $TRAVIS_NODE_VERSION;'
 
 script:
   - 'if [ -n "${LINT-}" ]; then npm run lint ; fi'

package.json

@@ -11,6 +11,10 @@
     "bin",
     "lib"
   ],
+  "engines" : {
+    "node" : ">=4.2.0",
+    "npm": ">=2.14.7"
+  },
   "devDependencies": {
     "ava": "^0.17.0",
     "babel-cli": "^6.14.0",