v0.3.1

• Improved documentation.
• Minor code cleanup.
• Added CI workflow.

v0.3.0

Enhancements

• [Existence] Added :on_state_change option.

v0.2.0

Enhancements

• [Existence] Added get_state!/1 and get_checks!/1.
• [Existence] Possible breaking change: current get_state/1 and get_checks/1 do not raise if
  ETS table doesn't exist. They return :undefined instead.
• [Existence.Plug] Added :raising? plug option.

v0.1.1

Minor documentation update.

v0.1.0

First package release.