Remove trim dependency

Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Closes GH-4.

index.js

@@ -1,7 +1,5 @@
 'use strict'
 
-var trim = require('trim')
-
 exports.parse = parse
 exports.stringify = stringify
 
@@ -10,10 +8,10 @@ var space = ' '
 var whiteSpace = /[ \t\n\r\f]+/g
 
 function parse(value) {
-  var input = trim(String(value || empty))
+  var input = String(value || empty).trim()
   return input === empty ? [] : input.split(whiteSpace)
 }
 
 function stringify(values) {
-  return trim(values.join(space))
+  return values.join(space).trim()
 }

package.json

@@ -21,9 +21,6 @@
   "files": [
     "index.js"
   ],
-  "dependencies": {
-    "trim": "0.0.1"
-  },
   "devDependencies": {
     "browserify": "^16.0.0",
     "esmangle": "^1.0.1",