Release v4.2.0

Release v4.1.0

Add `REGEX_TEXT_PRESENTATION`; release v4.0.4

Remove emoji-test.txt from Rubygems package; release v4.0.3

Release v4.0.2

Use RbConfig for Emoji version detection; release v4.0.1

Release v4.0.0

Release v3.8.0

Release v3.7.0

Release v3.6.0