Release 2.4.2

[pcai]

Cut 2.4.2 with the changes that landed since 2.4.1.

• Replace erubi with the Ruby standard library ERB; the erubi runtime dependency is gone (Replace erubi with stdlib ERB #366)
• Allow the logger dependency at version 1.5, so Ruby 3.2 users can use the bundled gem (logger: Allow 1.5 #367)

Bumps the version to 2.4.2 and records both changes in CHANGELOG.md.