Release Process

1. git fetch upstream
2. git checkout upstream/master
3. Create the ZIP file: gulp publish
4. Create the release on GitHub:
   1. Navigate to https://github.com/mozilla/pdf.js/releases/new
   2. Call the release and tag v{version} and insert the version from the name of the ZIP file.
   3. Attach the ZIP file from the step above and include release notes
      1. Clone https://github.com/brendandahl/pdf.js.utils
      2. Run python2 release.py {last_pr_number}, where {last_pr_number} is the last PR number (without hash) in the release notes of the existing release
   4. Label the existing release as stable
   5. Label the new release as pre-release
5. Update pdfjs.config to bump both the stable and beta version numbers:
   1. Bump the major/minor version number of the versionPrefix
   2. Bump the stable/beta version number
   3. Set baseVersion to the commit ID of the merge commit
6. Eat cake, a cookie or any other treat