feat!: replace xhr provider with @nextcloud/axios

[hereje]

• replace xml http request with @nextcloud/axios in request.js
• reorganize code in class Request so that it bevahes as with xhr
• update test suite requestTest.js

Fixes: #718

[st3iny]

Awesome, thanks! I will take a look at the code as soon as I can.

API-wise this is a breaking change. The xhrProvider argument is exposed publicly via DavClient. Removing it is a breaking change and we should do a major bump. I'm fine with that.

Please also remove the xhrProvider argument from DavClient's constructor in src/index.js in line 33.

[st3iny]

I rebased to fix conflicts.

[codecov]

Codecov Report

Attention: Patch coverage is 98.21429% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.14%. Comparing base (62ebc66) to head (23758d9).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/index.js	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #935      +/-   ##
==========================================
+ Coverage   83.90%   85.14%   +1.23%     
==========================================
  Files          30       30              
  Lines        1255     1245      -10     
  Branches      204      206       +2     
==========================================
+ Hits         1053     1060       +7     
+ Misses        202      185      -17     

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[st3iny]

Tested and works. Thank you very much for your contribution!

I adjusted some minor things, implemented abort signal handling and improved the testing of it.