Improve ava config

Author: sergeysova

package.json

@@ -11,7 +11,7 @@
     "lint": "eslint ./lib",
     "docs": "documentation build -f html -o docs",
     "deploy:docs": "buildbranch gh-pages docs",
-    "postversion": "npm run lint && npm run build && npm publish && npm run docs && git push --all origin && git push --tags origin &&  npm run deploy:docs"
+    "postversion": "npm run lint && npm test && npm run build && npm publish && npm run docs && git push --all origin && git push --tags origin &&  npm run deploy:docs"
   },
   "bin": {
     "createrest": "./bin/createrest.js",
@@ -54,6 +54,9 @@
   "ava": {
     "require": "babel-register",
     "concurrency": 4,
-    "babel": "inherit"
+    "babel": "inherit",
+    "files": [
+      "lib/*.test.js"
+    ]
   }
 }