Add automated releasing setup

[ewanharris]

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

🔧 Changes

Adds a release workflow that will tag and create a release when merging a release PR created by ship. This is copied over from go-auth0 where it was tested successfully

📚 References

🔬 Testing

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5cdd77b) 95.98% compared to head (e93eeae) 95.98%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #230   +/-   ##
=======================================
  Coverage   95.98%   95.98%           
=======================================
  Files           7        7           
  Lines         324      324           
=======================================
  Hits          311      311           
  Misses         10       10           
  Partials        3        3           

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