[tag-expressions/perl] Implementation of tag-expressions for Perl

[ehuelsmann]

Summary

This PR implements tag-expressions for Perl. It includes tests and release infrastructure.

Details

The parser is implemented in Cucumber::TagExpressions->parse(), which - like the Ruby variant - returns an object on which you can call either a stringify() method or an evaluate("@tag1", "@tag2") method.

Motivation and Context

Perl support for Cucumber and Gherkin primitives.

How Has This Been Tested?

With the test-suite that's included.

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• I've added tests for my code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have updated the CHANGELOG accordingly.

[aurelien-reeves]

As you know, I am not a perl developer, so my review is more based on the tests and the documentation.
But from what I can tell, it looks good 👌