fix: restore node 4 min support

Noyabronok · remy · commit 6d760f4f81e6 · 2017-12-12T17:36:15.000Z
* node 4 min
* add node 4 to travis
diff --git a/.gitignore b/.gitignore
@@ -18,3 +18,5 @@ node_modules
 coverage
 tmp
 test/fixtures/test*
+
+.idea
diff --git a/.travis.yml b/.travis.yml
@@ -8,6 +8,7 @@ node_js:
   - '9'
   - '8'
   - '6'
+  - '4'
 before_install:
   - if [ "$TRAVIS_PULL_REQUEST_BRANCH" == "" ]; then echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc; fi
 after_success:
diff --git a/package.json b/package.json
@@ -9,7 +9,7 @@
     "nodemon": "./bin/nodemon.js"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=4"
   },
   "repository": {
     "type": "git",
