chore(): Difined the precise engines to use for the project

Only version 6 of node is suppeort now

Author: vogelino

.travis.yml

@@ -6,14 +6,9 @@ cache:
 notifications:
   email: false
 node_js:
-  - '4'
-  - iojs-v3
-  - iojs-v2
-  - iojs-v1
-  - '0.12'
-  - '0.10'
+  - '6'
 before_install:
-  - npm i -g npm@^2.0.0
+  - npm i -g npm@^3.0.0
 before_script:
   - npm prune
 script:

package.json

@@ -21,7 +21,19 @@
     "type": "git",
     "url": "https://github.com/ExtendScript/extendscriptr.git"
   },
-  "keywords": ["automation", "build", "process", "extendScript", "indesign", "illustrator", "photoshop", "adobe", "es2105", "es6", "compile"],
+  "keywords": [
+    "automation",
+    "build",
+    "process",
+    "extendScript",
+    "indesign",
+    "illustrator",
+    "photoshop",
+    "adobe",
+    "es2105",
+    "es6",
+    "compile"
+  ],
   "author": "vogelino",
   "license": "WTFPL",
   "bugs": {
@@ -52,7 +64,7 @@
     }
   },
   "engineStrict": true,
-    "engines": {
-      "npm": ">=3.0.0"
-    }
+  "engines": {
+    "npm": ">=3.0.0"
   }
+}