Mecha

Feature
* Add bolt modules in data packs ([`1ad6291`](https://github.com/mcbeet/mecha/commit/1ad6291c3bba002c6e159f74bd57c8c0c614b70d))
* Introduce customizable source providers ([`909ed80`](https://github.com/mcbeet/mecha/commit/909ed808d36f83e26d2a34257abe159b22b40212))

Feature
* Make it possible to overload logical expressions ([`12c6946`](https://github.com/mcbeet/mecha/commit/12c6946bd0e7481941d50f52d4d1fa926ecac638))

Fix
* Better error when mutating free variable ([`09330b8`](https://github.com/mcbeet/mecha/commit/09330b872afbb99c1b14285d271c6d5b9462466d))
* Remove unnecessary isinstance check since AstJson.evaluate() always returns a json value ([`e31f1ae`](https://github.com/mcbeet/mecha/commit/e31f1aee6508b6c5958f8ea0a321a69c3ad5ab6a))

Feature
* Add branch overloading ([`2a7f821`](https://github.com/mcbeet/mecha/commit/2a7f821a39e1e11afdb4f509f4189fd081f5999e))
* Improve in operator overloading ([`bb706b0`](https://github.com/mcbeet/mecha/commit/bb706b08e8228dfeeb5da01a0d8a198c02f29f98))
* Add not operator overloading ([`7a6a387`](https://github.com/mcbeet/mecha/commit/7a6a38791154edbb31b40287e7ff5140bd3c1359))
* Empty lookup now means full slice ([`1567e9d`](https://github.com/mcbeet/mecha/commit/1567e9d8e298136b111569f1e5e04d5d6bd1d767))

Feature
* Better errors for undefined identifiers ([`7424ddf`](https://github.com/mcbeet/mecha/commit/7424ddf6748582567ab8841bf1d1f7ea97e40b45))

Fix
* Allow `` prefix when interpolating resource locations ([`3c1b7b5`](https://github.com/mcbeet/mecha/commit/3c1b7b510e721db6bc1c197d63232135392c6acf))
* Properly handle conditional branch scopes ([`236326b`](https://github.com/mcbeet/mecha/commit/236326b25dfe2d601d64ce1b8aa7c59960f7e5d7))

Fix
* Use full source path as cache key ([`f2d8944`](https://github.com/mcbeet/mecha/commit/f2d8944f8819c87b9aadfe56bc758ab1d8702e9b))