add 'no test' flag

package.json

@@ -8,7 +8,8 @@
   },
   "scripts": {
     "lint": "eslint .",
-    "ci": "yarn --frozen-lockfile && node jenkins.js"
+    "ci": "yarn --frozen-lockfile && node jenkins.js",
+    "test": "echo \"no test\""
   },
   "repository": {
     "type": "git",

stryker.conf.js

@@ -13,5 +13,5 @@ module.exports = {
   testRunner:       'command',
   transpilers:      [],
   coverageAnalysis: 'all',
-  mutate:           ['index.js']
+  mutate:           [ 'index.js' ]
 };