Add support for firebase bolt.

[JimiC]

Fixes #908

Changes proposed:

• Add
• Prepare
• Delete
• Fix

Things I've done:

• My pull request fixes an issue, I referenced the issue.

[codecov]

Codecov Report

Merging #991 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #991   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          44     44           
  Lines        2110   2110           
  Branches       99     99           
=====================================
  Hits         2110   2110

Impacted Files	Coverage Δ
src/icon-manifest/supportedExtensions.ts	100% <ø> (ø)	⬆️
src/icon-manifest/languages.ts	100% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c2b9228...567bdc5. Read the comment docs.