Support toml v1.1.0

[lpil]

https://github.com/toml-lang/toml/releases/tag/1.1.0

[0xda157]

What needs to be updated here? Comparing tom's source code/tests and the Toml v1.1 changelog it looks like everything is already supported here, except for the \xHH escape sequence (as already noted in the README).

[lpil]

All the new additions listed in the that page I linked need to be implemented for this to be closed.

[0xda157]

• inline tables with multiple lines and trailing commas already seems supported: https://github.com/lpil/tom/blob/9727b/test/tom_test.gleam#L301
• \e is already supported https://github.com/lpil/tom/blob/9727b/test/tom_test.gleam#L814
• time without seconds already seems supported: https://github.com/lpil/tom/blob/9727b/src/tom.gleam#L1257

and it looks like tom already follows all the clarifications included in those release notes. I'll submit a pr to implement unicode escapes soon, looks like the only thing missing to me.