Clean NPM scripts output
Clean NPM scripts output

I've just discovered that the reason NPM outputs a giant "npm ERR!" message
asking to contact the author of the library and suggesting that it’s most likely
“not a problem with npm itself” when I run "npm run lint" and I forgot a
semicolon is because the return code of an NPM script has to be 0. So this
commit adds "exit 0;" at the end of the NPM commands.

jtickle/wekan,oliver4u/WEKAN_runpartner,ahmadassaf/libreboard,GhassenRjab/wekan,nztqa/wekan,mario-orlicky/wekan,FSFTN/Wekan,johnleeming/wekan,mario-orlicky/wekan,oliver4u/WEKAN_runpartner,jtickle/wekan,oliver4u/sap-wekan,pro-to-tip/wekan,GhassenRjab/wekan,pro-to-tip/wekan,wekan/wekan,mario-orlicky/wekan,Serubin/wekan,johnleeming/wekan,Serubin/wekan,ddanssaert/wekan,oliver4u/WEKAN_runpartner,wekan/wekan,nztqa/wekan,wekan/wekan,GhassenRjab/wekan,ddanssaert/wekan,nztqa/wekan,oliver4u/sap-wekan,libreboard/libreboard,ddanssaert/wekan,ahmadassaf/libreboard,oliver4u/sap-wekan,jtickle/wekan,ahmadassaf/libreboard,johnleeming/wekan,libreboard/libreboard,wekan/wekan,johnleeming/wekan,Serubin/wekan,FSFTN/Wekan,wekan/wekan