docs(readme): add heron 5 to the bevy compatibility matrix

docs(readme): Discontinue the project

fix: `TimePlugin` being installed on behalf of the user (#320)

BREAKING CHANGE: The bevy `TimePlugin` must now be installed before installing the heron plugin

refactor(rapier): remove unused files

feat(heron_rapier): compatibility with `heron_rapier` v5 (#323)

feat(core): compatibility with heron v5 (#322)

docs(readme): announce phase out

ci: ignore RUSTSEC-2021-0139 (ansi_term is unmaintained) (#309)

chore: merge branch 'main' into alpha

chore(deps)!: require bevy 0.8 (#301)