Add github pull request template
Add github pull request template

ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,apache/cordova-mobile-spec,apache/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,ollie314/cordova-mobile-spec,ollie314/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec