Move tests to *.spec.js (#5)

Author: wojtekmaj

package.json

@@ -5,7 +5,7 @@
   "main": "dist/index.js",
   "es6": "src/index.js",
   "scripts": {
-    "build": "babel src -d dist --ignore __tests__",
+    "build": "babel src -d dist --ignore **/*.spec.js",
     "clean": "rimraf dist",
     "lint": "eslint src/ --ext .jsx,.js",
     "prepublishOnly": "yarn clean && yarn build",