## Summary
- URL-encode the Python version component before adding it to the cache
key
- URL-encode the user-provided cache suffix for the same reason
- Add cache key tests for Python ranges, comma-containing suffixes, and
unchanged simple inputs
Fixes#914
Refs: pi-session 019f3164-85e7-7817-bffd-501d89b3a1fd
## Tests
- npm run all
