Log Message:
devel/ruby-flexmock: update to 2.3.8

2.3.8 (2023-08-13)

* remove executable flag on all lib ruby files
* in partial mocks, find the original method through metaprogramming
* CI: Drop unused Travis sudo: false directive
* Gemfile: use https for RubyGems.org
* update required ruby version to 2.2, and update Travis ruby versions
* CI: Use JRuby in the matrix
* update the links in doc/
* README: Use SVG badges
* fix: spelling of Minitest
* chore: run tests through GitHub actions
* Fixes support for minitest >= 5.19