Drop Python 3.7 support.

[wRAR]

No description provided.

[codecov]

Codecov Report

Merging #141 (8a8b20f) into master (ddd9784) will increase coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 8a8b20f differs from pull request most recent head 772bc6f. Consider uploading reports for the commit 772bc6f to get more accurate results

@@            Coverage Diff             @@
##           master     #141      +/-   ##
==========================================
+ Coverage   95.46%   95.49%   +0.02%     
==========================================
  Files           2        3       +1     
  Lines         904      910       +6     
  Branches      161      161              
==========================================
+ Hits          863      869       +6     
  Misses         24       24              
  Partials       17       17              

see 1 file with indirect coverage changes