remove node@4 support (#151)

* remove node@4 support

* remove babel

* add engine field

* up lock file

* add options description

.travis.yml

@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-  - "4"
   - "6"
   - "node"
 

README.md

@@ -31,11 +31,27 @@ into:
 composes: className [... className] from "path/to/file.css";
 ```
 
+## Options
+
+- `failOnWrongOrder` `bool` generates exception for unpredictable imports order.
+
+```css
+.aa {
+  composes: b from './b.css';
+  composes: c from './c.css';
+}
+
+.bb {
+  /* "b.css" should be before "c.css" in this case */
+  composes: c from './c.css';
+  composes: b from './b.css';
+}
+```
+
 ## Building
 
 ```
 npm install
-npm build
 npm test
 ```
 

package.json

@@ -1,35 +1,25 @@
 {
   "name": "postcss-modules-extract-imports",
-  "version": "1.2.1",
+  "version": "2.0.0",
   "description": "A CSS Modules transform to extract local aliases for inline imports",
-  "main": "lib/index.js",
+  "main": "src/index.js",
+  "engines": {
+    "node": ">= 6"
+  },
   "files": [
-    "lib"
+    "src"
   ],
   "scripts": {
-    "build": "babel --out-dir lib src",
     "test": "jest --coverage",
     "precommit": "lint-staged",
-    "prepublish": "yarn run test && yarn run build"
+    "prepublish": "yarn run test"
   },
   "lint-staged": {
     "*.js": [
       "prettier --single-quote --no-semi --write",
       "git add"
     ]
   },
-  "babel": {
-    "presets": [
-      [
-        "env",
-        {
-          "targets": {
-            "node": 4
-          }
-        }
-      ]
-    ]
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/css-modules/postcss-modules-extract-imports.git"
@@ -49,10 +39,6 @@
     "postcss": "^7.0.5"
   },
   "devDependencies": {
-    "babel-cli": "^6.24.1",
-    "babel-eslint": "^7.2.2",
-    "babel-jest": "^20.0.3",
-    "babel-preset-env": "^1.5.1",
     "codecov.io": "^0.1.2",
     "coveralls": "^2.11.2",
     "husky": "^0.13.3",