Add support for mocha v4 (#43)

.travis.yml

@@ -9,18 +9,22 @@ notifications:
 before_install:
   - "export DISPLAY=:99.0"
   - "sh -e /etc/init.d/xvfb start"
-
-before_script:
   - npm install $MOCHA --force
 
 env:
   - MOCHA=mocha@1
   - MOCHA=mocha@2
   - MOCHA=mocha@3
+  - MOCHA=mocha@4
 
 node_js:
   - "0.10"
   - "4"
   - "stable"
 
+matrix:
+  exclude:
+  - env: MOCHA=mocha@4
+    node_js: "0.10"
+
 after_script: "npm install coveralls@2 && cat ./coverage/lcov.info | coveralls"

package.json

@@ -13,7 +13,7 @@
     "build": "browserify lib/co-mocha.js -s co-mocha -o co-mocha.js",
     "test-spec": "mocha --harmony -R spec --require lib/co-mocha.js --bail",
     "test-cov": "testem ci -l Firefox,Node",
-    "test": "npm run lint && npm run build && npm run test-cov"
+    "test": "mocha -V && npm run lint && npm run build && npm run test-cov"
   },
   "repository": {
     "type": "git",
@@ -59,6 +59,6 @@
     "is-generator": "^1.0.1"
   },
   "peerDependencies": {
-    "mocha": ">=1.18 <4"
+    "mocha": ">=1.18 <5"
   }
 }