fix(dependencies): Upgrade all dependencies and remove support for no…

…de.js 4

BREAKING CHANGE: Remove support for node.js 4

fix #30 #29 #28 #25

.gitignore

@@ -2,3 +2,4 @@ node_modules
 /coverage
 npm-debug.log
 .DS_Store
+package-lock.json

.travis.yml

@@ -9,7 +9,6 @@ node_js:
   - '8'
   - '7'
   - '6'
-  - '4'
 after_success:
   - npm run travis-deploy-once "npm run semantic-release"
 branches:

index.js

@@ -336,7 +336,7 @@ module.exports = function () {
   }, function flush () {
     var file = new File({
       path: 'lcov.info',
-      contents: new Buffer(createRecords(coverageFiles))
+      contents: Buffer.from(createRecords(coverageFiles))
     })
     this.push(file)
     this.emit('end')

package.json

@@ -38,25 +38,25 @@
   "license": "MIT",
   "readmeFilename": "README.md",
   "dependencies": {
-    "through2": "^2.0.1",
-    "vinyl": "^2.0.0",
-    "vinyl-fs": "^2.4.3"
+    "through2": "^2.0.3",
+    "vinyl": "^2.1.0",
+    "vinyl-fs": "^3.0.2"
   },
   "devDependencies": {
-    "chai": "^3.5.0",
+    "chai": "^4.1.2",
     "chai-gulp-helpers": "0.0.3",
-    "coveralls": "^2.11.9",
+    "coveralls": "^3.0.0",
     "cracks": "^3.1.2",
-    "cz-conventional-changelog": "^2.0.0",
-    "eslint": "^3.1.0",
-    "eslint-config-standard": "^6.0.0",
-    "eslint-plugin-promise": "^3.0.0",
-    "eslint-plugin-standard": "^2.0.0",
-    "istanbul": "^0.4.2",
-    "mocha": "^3.0.0",
+    "cz-conventional-changelog": "^2.1.0",
+    "eslint": "^4.18.2",
+    "eslint-config-standard": "^11.0.0",
+    "eslint-plugin-promise": "^3.6.0",
+    "eslint-plugin-standard": "^3.0.1",
+    "istanbul": "^0.4.5",
+    "mocha": "^5.0.3",
     "semantic-release": "^12.4.1",
-    "standard": "^8.0.0",
-    "travis-deploy-once": "^4.3.3"
+    "standard": "^11.0.0",
+    "travis-deploy-once": "^4.3.4"
   },
   "engines": {
     "node": ">=4 <=9"