Ensure semver_dialect compatibility with ruby 3.0, 3.1 and 3.2

Proposal

Following up on the audit for Ruby 3.1/3.2 compatibility we realized that semver_dialect gem is currently only tested with ruby 2.6.

We need to add proper tests and ensure its compatibility with ruby 3.0, 3.1, and 3.2.

Implementation plan

1. Update the unit test job to use a parallel:matrix to run the unit tests using the following images:
   • ruby:3.0
   • ruby:3.1
   • ruby:3.2
2. Update the Ruby audit spreadsheet by writing N in the Action required column (cell K216)