coverage doesn't work for files outside of build/src

[trentgrover-wf]

[12:20 PM] Tom Connell: I can't seem to get wGulp karma-coverage to find the source files. Istanbul report is showing up with no files found: 'No data to display' Any advice on this one?
It might be related to computmaxer/karma-jspm#22
[12:58 PM] Tom Connell: Looks like its because I have jspm looking at my src directory instead of build directory.
build/src, I should say
[1:32 PM] Trent Grover: karma should still be serving up src files:
 https://github.com/Workiva/wGulp/blob/master/src/template/karma.conf.js
[1:33 PM] Trent Grover: did you actually run 'gulp cover'?
or were you just looking for coverage output after running gulp test?
[1:35 PM] Trent Grover: looks like there's a hard-coded coverage preprocessor path set at 'build/src':
 https://github.com/Workiva/wGulp/blob/master/src/tasks/karma.js#L93
we'll have to swap that out for the configured path