Register the Notification model to Django admin

[IslamMesha]

• Register the Notification model to the Django admin

[codecov]

Codecov Report

Merging #4186 (8005263) into master (bf63188) will increase coverage by 0.09%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4186      +/-   ##
==========================================
+ Coverage   87.67%   87.76%   +0.09%     
==========================================
  Files         290      290              
  Lines       15864    16049     +185     
==========================================
+ Hits        13909    14086     +177     
- Misses       1955     1963       +8     

Files	Coverage Δ
src/oscar/apps/communication/admin.py	100.00% <100.00%> (ø)

... and 183 files with indirect coverage changes

[IslamMesha]

Hi @viggo-devries,

Thank you for reviewing my pull request.

How can I pass the Codecov of this pull request to be merged?

Thank you.