Test before publish

Author: nihalgonsalves

package.json

@@ -14,7 +14,7 @@
     "format:check": "prettier . --check",
     "format:write": "prettier . --write",
     "test": "node bin/test.js",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build && npm run test"
   },
   "files": [
     "dist/**/*"