fix: force mocha to exit when 0 tests (#42357)
fix: force mocha to exit when 0 tests (#42357)

Otherwise a command like

npm run test:curriculum -- -g 'Not a real title'

will spin forever
FreeCodeCamp/FreeCodeCamp,raisedadead/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp