* spec: add tests for the autoUpdater on macOS that actually test if it works
* spec: add express as dep
* spec: add logic to auto-trust self-signed certificate and not run autoupdate specs on MAS
* build: fix the step name for importing the codesign cert
* chore: update updater spec PR as per feedback
* fix: s/atomBinding/electronBinding
* build: use spawn instead of exec
