NOTE:
  'electron' version needs to be manually specified (removed '^' prefix)
  to workaround electron-builder's parser bug.

  Otherwise, macOS signing step fails with following error:
    ⨯ Cannot compute electron version from installed node modules - none of the possible electron modules are installed.

  https://github.com/electron-userland/electron-builder/issues/4157

Electron concatenate extra byte at end of .zip file content and causes zip utils to think file's corrupt.

Remove references to test templates from production code and deal gracefully with the lack of provided templates argument.