Release v0.3.0

[0.3.0] - 2021-01-17

Added

• Finally got round to writing a changelog.
• Released to rubygems.org
• First version released to Github releases
• 100% mutation coverage
• Note: Versions prior to 0.3.0 were never tagged, built, nor released.

Changed

• Correctly specified rubies supported for the first time.
• Dropped support for Ruby 2.4

Fixed

• Fixed issue where LIRC::Messages::ResponseParser#parse_line could return
  ArgumentError instead of ParseError in rare circumstances.