Merge pull request #298 from mlua-rs/add_deprecation

Bump version to 0.20.1 and add deprecation status.

Update -sys crates to 0.1.7, add deprecatec status

Merge pull request #297 from mlua-rs/transition_0.20.0

Draft: Transition 0.20.0

Merge pull request #295 from amethyst/update_0.19.8

Updates for 0.19.8.

Merge pull request #279 from amethyst/fix-readme

Fix table in README.md

Merge pull request #278 from amethyst/update_0.19.6

Updates for 0.19.6.

Update sys crate versions.

Merge pull request #270 from amethyst/update_0.19.5

Update versions and changelog ready for 0.19.5 release.

Update versions and changelog ready for release.

Bump rlua version and the Lua 5.4 -sys dependency version.