Find a way to update the version number in code

[ColinEberhardt]

Currently version numbers are managed by semantic release, however, I'd like to have it in the code too so that I can log client version information

[chriswilty]

This is addressed in a branch on my fork, using rollup's replace plugin: https://github.com/chriswilty/applause-button/compare/feature/a11y...chriswilty:applause-button:chore/package-version