Fix karma script (#104)
Fix karma script (#104)

* fix karma/npm script issue

* remove headless chromium  from browser options

* clear trailing space

* fix the same for code coverage step

Co-authored-by: RichardYang_2016 <bcaf43d104333c5b355d1de783ba8c955d3a4fe9@google.com>
googleinterns/role-call,googleinterns/role-call,googleinterns/role-call,googleinterns/role-call,googleinterns/role-call