v0.8.0

Release v0.8.0

- (crate) Implement `From<String>` for option types
- Promote only TR implementation to 'TDK' style guide
- (crate) Specify new `Decasify` trait
- (crate) Implement `Decasify` trait for commonn types
- (lua) Implement `FromLua` for relevant crate types
- (cli) Improve console error message output with Snafu
- (lua) Make sure LuaRock identifies its version even when sideloaded
- (crate) [breaking] Stop exporting `Segment` type
- (crate) [breaking] Change out anyhow for snafu errors in library
- (crate) [breaking] Flatten modules to simplify public API
- [breaking] Rename `to_()` functions as just `()`