* Add support for multiple mocha reporters
Allows us to output to junit file and to console at the same time
* Cleanup VSTS file
Don't install depot_tools everytime as it is already installed.
Only run tests if "RUN_TESTS" environment variable is set
Only notify slack if "NOTIFY_SLACK" environment variable is set
Don't use sccache for release builds
Move CircleCI mac builds to VSTS
* Only build mac PRS from forks
Don't install depot_tools everytime as it is already installed.
Only run tests if "RUN_TESTS" environment variable is set
Only notify slack if "NOTIFY_SLACK" environment variable is set
Don't use sccache for release builds
Move CircleCI mac builds to VSTS
Use sccache helper script
* rename vsts-gn.yml to vsts.yml
Make sure Electron isn't running before starting tests
