Override test runner

Author: AndrewJo

circle.yml

@@ -9,6 +9,10 @@ checkout:
     - git config user.email "support@verdigris.co"
     - git config user.name "Verdigris Technologies"
 
+test:
+  override:
+    - istanbul cover ./tests/runner.js --report lcovonly && codecov
+
 deployment:
   codecov:
     branch: /.*/