[ADD] SRI hashes to static files

[ppfeufer]

Description

Added

• SRI hashes to static files

Changed

• Minimum requirements
  • Alliance Auth >= 4.6.0

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 4 lines in your changes missing coverage. Please review.

Project coverage is 96.16%. Comparing base (4b5280a) to head (17f644f).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...a_bulletin_board/templatetags/aa_bulletin_board.py	82.61%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #167      +/-   ##
==========================================
- Coverage   97.36%   96.16%   -1.20%     
==========================================
  Files          10       12       +2     
  Lines         227      260      +33     
  Branches       12       15       +3     
==========================================
+ Hits          221      250      +29     
- Misses          3        5       +2     
- Partials        3        5       +2     

Files with missing lines	Coverage Δ
aa_bulletin_board/constants.py	100.00% <100.00%> (ø)
aa_bulletin_board/helper/static_files.py	100.00% <100.00%> (ø)
...a_bulletin_board/templatetags/aa_bulletin_board.py	84.62% <82.61%> (-15.38%)	⬇️

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