Modernize LessCache and make its interface asynchronous

.babelrc

@@ -0,0 +1,5 @@
+{
+  "plugins": [
+    "transform-async-to-generator"
+  ]
+}

.npmignore

@@ -1,4 +1,4 @@
-*.coffee
+src
 spec
 .pairs
 .travis.yml

README.md

@@ -8,9 +8,17 @@ Caches the compiled `.less` files as `.css`.
 npm install less-cache
 ```
 
-```coffeescript
-LessCache = require 'less-cache'
+```javascript
+const LessCache = require('less-cache')
+const cache = new LessCache({cacheDir: '/tmp/less-cache'})
 
-cache = new LessCache(cacheDir: '/tmp/less-cache')
-css = cache.readFileSync('/Users/me/apps/static/styles.less')
+// This method returns a {Promise}, but you can avoid waiting on it as it will
+// be waited upon automatically when calling `readFile` or `cssForFile` later.
+cache.load()
+const css1 = await cache.readFile('/Users/me/apps/static/styles.less')
+
+// Similarly to `load`, this method will return a {Promise} and subsequent calls
+// to `readFile` or `cssForFile` will automatically wait on it.
+cache.setImportPaths(['path-1', 'path-2'])
+const css2 = await cache.readFile('/Users/me/apps/static/styles.less')
 ```

package.json

@@ -2,10 +2,10 @@
   "name": "less-cache",
   "version": "1.0.0",
   "description": "Less compile cache",
-  "main": "./lib/less-cache",
+  "main": "./lib/less-cache.js",
   "scripts": {
-    "prepublish": "grunt clean lint coffee",
-    "test": "grunt test"
+    "test": "mocha test/**/*.test.js --compilers js:babel-register",
+    "prepublish": "rimraf lib && babel src -d lib"
   },
   "repository": {
     "type": "git",
@@ -33,14 +33,14 @@
     "walkdir": "0.0.11"
   },
   "devDependencies": {
-    "fstream": "^1.0.10",
-    "grunt": "^1.0.1",
-    "grunt-cli": "^1.2.0",
-    "grunt-coffeelint": "0.0.16",
-    "grunt-contrib-coffee": "^1.0.0",
-    "grunt-shell": "^1.3.0",
-    "jasmine-focused": "1.x",
-    "temp": "^0.8.3",
-    "tmp": "0.0.28"
+    "babel-cli": "^6.23.0",
+    "babel-plugin-transform-async-to-generator": "^6.22.0",
+    "babel-register": "^6.23.0",
+    "dedent": "^0.7.0",
+    "expect.js": "^0.3.1",
+    "mocha": "^3.2.0",
+    "rimraf": "^2.6.1",
+    "sinon": "^1.17.7",
+    "temp": "^0.8.3"
   }
 }