Missing LDAP-style case insensitive search in Entries

[HenkPoley]

Not sure if it should be named like this, but I was missing LDAP-style case insensitive search in Entries.

Maybe use mb_strtolower ? Or an LDAP spec strtolower() implementation.. ?

I'm not even sure if I would merge this as is 😅

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 89.43%. Comparing base (7722aea) to head (f5508c3).
Report is 100 commits behind head on master.

Files with missing lines	Patch %	Lines
src/FreeDSx/Ldap/Entry/Entries.php	0.00%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #41      +/-   ##
============================================
- Coverage     89.71%   89.43%   -0.28%     
- Complexity     1780     1788       +8     
============================================
  Files           115      115              
  Lines          3850     3862      +12     
============================================
  Hits           3454     3454              
- Misses          396      408      +12     

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