Move toLower to cache

[snuyanzin]

No description provided.

[codecov-commenter]

Codecov Report

Merging #625 (e7a8738) into main (5b72bac) will increase coverage by 0.20%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #625      +/-   ##
============================================
+ Coverage     92.81%   93.01%   +0.20%     
- Complexity     2613     2617       +4     
============================================
  Files           280      280              
  Lines          5369     5369              
  Branches        585      585              
============================================
+ Hits           4983     4994      +11     
+ Misses          238      226      -12     
- Partials        148      149       +1     

Impacted Files	Coverage Δ
.../java/net/datafaker/service/FakeValuesService.java	84.92% <100.00%> (ø)
...c/main/java/net/datafaker/providers/base/Text.java	78.81% <0.00%> (+0.84%)	⬆️
.../main/java/net/datafaker/service/FakerContext.java	88.70% <0.00%> (+1.61%)	⬆️
...ker/idnumbers/pt/br/IdNumberGeneratorPtBrUtil.java	96.29% <0.00%> (+3.70%)	⬆️
...n/java/net/datafaker/providers/base/BaseFaker.java	93.91% <0.00%> (+6.08%)	⬆️

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