[Perl/perl5] e83e59: WIP: try running tests on Big Sur?

[Leon Timmermans via perl5-changes]

  Branch: refs/heads/el-sur-dynaloader
  Home:   https://github.com/Perl/perl5
  Commit: e83e59a907f73558eb4fe3f8ff9b1b9a3174ba3d
      
https://github.com/Perl/perl5/commit/e83e59a907f73558eb4fe3f8ff9b1b9a3174ba3d
  Author: Leon Timmermans <faw...@gmail.com>
  Date:   2020-12-17 (Thu, 17 Dec 2020)

  Changed paths:
    M .github/workflows/testsuite.yml

  Log Message:
  -----------
  WIP: try running tests on Big Sur?