Update dependencies, including less ~2.7.1.

.travis.yml

@@ -1,15 +1,18 @@
 sudo: false
+
 language: node_js
+
 node_js:
   - "0.10"
   - "0.12"
   - "4"
   - "5"
+  - "6"
   - "iojs"
-before_install:
-  - if [ "$TRAVIS_NODE_VERSION" = "0.10" ]; then npm install -g npm@2; fi
+
 matrix:
   fast_finish: true
+
 cache:
   directories:
     - node_modules

appveyor.yml

@@ -1,5 +1,3 @@
-# http://www.appveyor.com/docs/appveyor-yml
-
 clone_depth: 10
 
 version: "{build}"
@@ -17,14 +15,11 @@ environment:
       platform: x86
     - nodejs_version: "5"
       platform: x86
+    - nodejs_version: "6"
+      platform: x86
 
 install:
   - ps: Install-Product node $env:nodejs_version $env:platform
-  - ps: >-
-      if ($env:nodejs_version -eq "0.10") {
-        npm -g install npm@2
-        $env:PATH="$env:APPDATA\npm;$env:PATH"
-      }
   - npm install
 
 test_script:

package.json

@@ -16,9 +16,9 @@
     "test": "grunt test"
   },
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^2.0.0",
     "chalk": "^1.0.0",
-    "less": "~2.6.0",
+    "less": "~2.7.1",
     "lodash": "^4.8.2"
   },
   "devDependencies": {