Move the provider deps into an optional feature.

[wRAR]

Fixes #97

[codecov]

Codecov Report

Merging #98 (a15e224) into main (3c82d07) will increase coverage by 1.31%.
The diff coverage is n/a.

❗ Current head a15e224 differs from pull request most recent head eaa3409. Consider uploading reports for the commit eaa3409 to get more accurate results

@@            Coverage Diff             @@
##             main      #98      +/-   ##
==========================================
+ Coverage   97.14%   98.45%   +1.31%     
==========================================
  Files          18        9       -9     
  Lines        1294      647     -647     
==========================================
- Hits         1257      637     -620     
+ Misses         37       10      -27     

see 13 files with indirect coverage changes