Adding release checksum.

Signing v0.12.0

Added tag v0.12.0 for changeset 0594420d4019

Bump the minor version, update history.

Update dependencies

Remove old pragmas

Fixed the sourcehut URL

Bumping Ruby version

Update my gem-signing cert and the README

Add fields to inherited component classes, update for Ruby 3

Adding release checksum.

Signing v0.11.0

Added tag v0.11.0 for changeset 2c801c8db6c8

Update my gem-signing cert

Bump the minor version and the README, update history

De-hoeify, use 2.7 for testing.

Tweak timing loop settings

Bump to Ruby 2.6.

Added tag v0.10.0 for changeset 8ce67427e698

Added signature for changeset 98e0342b58f8