Merge pull request #531 from Leonidas-from-XIV/node-4

Restore Node 4 compatibility temporarily

.travis.yml

@@ -1,6 +1,8 @@
 language: node_js
 
 node_js:
+  - "4"
+  - "6"
   - "8"
   - "10"
   - "12"

package.json

@@ -75,7 +75,8 @@
   },
   "dependencies": {
     "sax": ">=0.6.0",
-    "xmlbuilder": "~13.0.0"
+    "xmlbuilder": "~11.0.0",
+    "util.promisify": "~1.0.0"
   },
   "devDependencies": {
     "coffee-script": ">=1.10.0",
@@ -86,7 +87,7 @@
     "zap": ">=0.2.9"
   },
   "engines": {
-    "node": ">=8.0.0"
+    "node": ">=4.0.0"
   },
   "license": "MIT"
 }

src/parser.coffee

@@ -2,11 +2,11 @@
 
 sax = require 'sax'
 events = require 'events'
-util = require 'util'
 bom = require './bom'
 processors = require './processors'
 setImmediate = require('timers').setImmediate
 defaults = require('./defaults').defaults
+promisify = require 'util.promisify'
 
 # Underscore has a nice function for this, but we try to go without dependencies
 isEmpty = (thing) ->
@@ -255,7 +255,7 @@ class exports.Parser extends events
         throw err
 
   parseStringPromise: (str) =>
-    util.promisify(@parseString) str
+    promisify(@parseString) str
 
 exports.parseString = (str, a, b) ->
   # let's determine what we got as arguments

test/parser.test.coffee

@@ -5,11 +5,11 @@ util = require 'util'
 assert = require 'assert'
 path = require 'path'
 os = require 'os'
-util = require 'util'
+promisify = require 'util.promisify'
 
 fileName = path.join __dirname, '/fixtures/sample.xml'
 
-readFilePromise = util.promisify fs.readFile
+readFilePromise = promisify fs.readFile
 
 skeleton = (options, checks) ->
   (test) ->