fix: do not use empty tags list for cucumber (#46)

Fixes regression by cucumber@3.0.6

cucumber/common#296 (comment)

Author: dherges

protractor.conf.js

@@ -26,7 +26,7 @@ exports.config = {
     // require step definition files before executing features
     require: ['./e2e/steps/**/*.ts'],
     // <string[]> (expression) only execute the features or scenarios with tags matching the expression
-    tags: [],
+    // tags: [],
     // <boolean> fail if there are any undefined or pending steps
     strict: true,
     // <string[]> (type[:path]) specify the output format, optionally supply PATH to redirect formatter output (repeatable)