Maximiliano authored Feb 04, 2022 and Alexander Mikhaylenko committed Feb 04, 2022

Cleanups include

- Replacing "Since: 0.0.x" with "Since: 1.0" as libhandy 0.x is irrelevant here
- Rewording docs for gi-docgen
- Rewording @self parameters
- Removing @self from signals
- Get/Set -> Gets/Sets
- Fixing a few annotations
- Adding missing docs

Fixes #104
Fixes #266
Fixes #438