Remove isRequired() from doctrine config

[Nyholm]

This would allow me to write:

trikoder_oauth2:
  persistence:
    doctrine: ~

If we do have isRequired() then there is no point in specifying a default value for entity_manager

[codecov-io]

Codecov Report

Merging #56 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master     #56      +/-   ##
===========================================
- Coverage     90.81%   90.8%   -0.01%     
  Complexity      280     280              
===========================================
  Files            43      43              
  Lines           980     979       -1     
===========================================
- Hits            890     889       -1     
  Misses           90      90

Impacted Files	Coverage Δ	Complexity Δ
DependencyInjection/Configuration.php	100% <ø> (ø)	9 <0> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7ad80d0...8954f00. Read the comment docs.

[X-Coder264]

Thanks for the PR @Nyholm.

[Nyholm]

Thank you for merging

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.80%. Comparing base (7ad80d0) to head (8954f00).
Report is 385 commits behind head on master.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #56      +/-   ##
============================================
- Coverage     90.81%   90.80%   -0.01%     
  Complexity      280      280              
============================================
  Files            43       43              
  Lines           980      979       -1     
============================================
- Hits            890      889       -1     
  Misses           90       90              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.