Update http2 requirement to ~3.3.7 (#80)
Update http2 requirement to ~3.3.7 (#80)

Updates the requirements on [http2](https://github.com/molnarg/node-http2) to permit the latest version.
- [Release notes](https://github.com/molnarg/node-http2/releases)
- [Changelog](https://github.com/molnarg/node-http2/blob/master/HISTORY.md)
- [Commits](https://github.com/molnarg/node-http2/commits/v3.3.7)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Innovate-Technologies/Cast,Innovate-Technologies/Cast,Innovate-Technologies/Cast