ci(release): Add .version file

[evansims]

Changes

This PR:

• Adds a .version file as part of our updated release process.
• Updates .shiprc to ensure the new file is bumped during releases.
• Updates .shiprc to properly reflect versions are bumped in src/ServiceAbstract.php now. (Ship has not traditionally been used to cut releases for this SDK, so I am bringing this up to date now as I intended to use that moving forward.)

References

N/A

Testing

N/A

Contributor Checklist

• I agree to adhere to the Auth0 General Contribution Guidelines.
• I agree to uphold the Auth0 Code of Conduct.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c2a45f4) 100.00% compared to head (9361e62) 100.00%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##                main      #438   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       532       532           
===========================================
  Files             31        31           
  Lines           1325      1325           
===========================================
  Hits            1325      1325           

Flag	Coverage Δ
unittestsvalidate	100.00% <ø> (ø)

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