Bump version

MSP-9895

Increment PATCH from 2 to 3 as the introduction of
Metasploit::Concern.run and its shared example are compatible changes:
old code (in metasploit_data_models) can continue to not use and it will
work fine.
Update version_spec.rb to handle tags

MSP-9895

Copy version_spec.rb from yard-metasploit-erd that includes changes to
handle TRAVIS_CI containing a version tag.