Drop doctrine/cache dependency

[TamasSzigeti]

Fixes #353

There are further possible improvements, trying to keep a smaller scope here.

[codecov-commenter]

Codecov Report

Merging #373 (674408d) into master (0cd315a) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #373      +/-   ##
============================================
+ Coverage     98.32%   98.41%   +0.09%     
+ Complexity     1578     1575       -3     
============================================
  Files           147      147              
  Lines          4245     4235      -10     
============================================
- Hits           4174     4168       -6     
+ Misses           71       67       -4     

Impacted Files	Coverage Δ
src/SchemaFactory.php	100.00% <100.00%> (+2.53%)	⬆️

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