fix: appveyor ci config added

Author: StephanGerbeth

.appveyor.yml

@@ -0,0 +1,15 @@
+version: "{build}"
+
+install:
+  - ps: $nodejs_version = Get-Content .nvmrc -Raw | foreach{ $_.Trim()}
+  - ps: Install-Product node $nodejs_version
+  - npm install
+
+build: off
+
+test_script:
+  - node --version && npm --version
+  - npm run test
+
+matrix:
+  fast_finish: true

package.json

@@ -14,7 +14,7 @@
     "test:only": "mocha --require babel-core/register --require babel-polyfill --recursive",
     "test:watch": "npm test -- --watch",
     "test:examples": "node examples/",
-    "cover": "istanbul cover _mocha -- --require babel-core/register --require babel-polyfill --recursive",
+    "cover": "istanbul cover node_modules/mocha/bin/_mocha -- --require babel-core/register --require babel-polyfill --recursive",
     "lint": "eslint src",
     "build": "cross-env BABEL_ENV=production babel src --out-dir lib",
     "prepare": "npm run clean && npm run lint && npm run test && npm run build",