[Node 8] Bump to Node 8

.circleci/config.yml

@@ -365,24 +365,6 @@ jobs:
       - store_test_results:
           path: ~/react-native/reports/junit
 
-  # Runs JavaScript tests on Node 6
-  test_javascript_node6_compatibility:
-    <<: *defaults
-    docker:
-      - image: circleci/node:6
-    steps:
-      - checkout
-      - run: *setup-artifacts
-
-      - restore-cache: *restore-cache-yarn
-      - run: *yarn
-      - save-cache: *save-cache-yarn
-
-      - run: *run-js-tests
-
-      - store_test_results:
-          path: ~/react-native/reports/junit
-
   # Runs unit tests on iOS devices
   test_ios:
     <<: *macos_defaults
@@ -624,10 +606,6 @@ workflows:
           requires:
             - checkout_code
 
-      # Test JavaScript using Node 6, the minimum supported version
-      - test_javascript_node6_compatibility:
-          filters: *filter-ignore-gh-pages
-
       # Test Android
       - test_android:
           filters: *filter-ignore-gh-pages

local-cli/server/checkNodeVersion.js

@@ -14,7 +14,7 @@ var formatBanner = require('metro-core/src/formatBanner');
 var semver = require('semver');
 
 module.exports = function() {
-  if (!semver.satisfies(process.version, '>=4')) {
+  if (!semver.satisfies(process.version, '>=8')) {
     var engine = semver.satisfies(process.version, '<1') ? 'Node' : 'io.js';
 
     var message =
@@ -24,15 +24,15 @@ module.exports = function() {
       process.version +
       '.\n' +
       '\n' +
-      'React Native runs on Node 4.0 or newer. There are several ways to ' +
+      'React Native runs on Node 8.0 or newer. There are several ways to ' +
       'upgrade Node.js depending on your preference.\n' +
       '\n' +
       'nvm:       nvm install node && nvm alias default node\n' +
       'Homebrew:  brew unlink iojs; brew install node\n' +
       'Installer: download the Mac .pkg from https://nodejs.org/\n' +
       '\n' +
       'About Node.js:   https://nodejs.org\n' +
-      'Follow along at: https://github.com/facebook/react-native/issues/2545';
+      'Follow along at: https://github.com/facebook/react-native/issues/19226';
     console.log(
       formatBanner(message, {
         chalkFunction: chalk.green,

package.json

@@ -8,7 +8,7 @@
     "url": "git@github.com:facebook/react-native.git"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=8"
   },
   "prettier": {
     "requirePragma": true,