Mecha

Feature
* Add mecha.contrib.relative_location ([`7270458`](https://github.com/mcbeet/mecha/commit/72704581a8c088c8852e5c30f5ec111ccf6c4c05))

Fix
* Prevent minor caching inconsistency ([`5457144`](https://github.com/mcbeet/mecha/commit/5457144bf210cb71a61c9f601bd75ac51e268797))

Fix
* Typo when using set_location ([`2d16d63`](https://github.com/mcbeet/mecha/commit/2d16d6327ce63e67214843fe84b277c6118f0aa5))

Feature
* Add mecha.contrib.messages ([`99b62de`](https://github.com/mcbeet/mecha/commit/99b62de825a17552489d7b379c79be8b6adf0f34))
* Default diagnostic location to the location of the node ([`b3b7cca`](https://github.com/mcbeet/mecha/commit/b3b7cca1d90fc44fb2a23f335120d65cbd144e5d))
* Add AstJson.from_value ([`5ddfdf0`](https://github.com/mcbeet/mecha/commit/5ddfdf0eddca5851529ca24e5c3f5c35a9be2124))

Fix
* Add discord badge ([`d721c44`](https://github.com/mcbeet/mecha/commit/d721c4425119864c93d0d5a17e0b244ef6c18ba3))

Fix
* Move InvalidEscapeSequence and UnrecognizedParser ([`f17030c`](https://github.com/mcbeet/mecha/commit/f17030c9db2424d4e7a90df88c24b624d938d8df))