Bolt

Fix
* Default empty arguments for AstFunctionSignature ([`6c79443`](https://github.com/mcbeet/bolt/commit/6c794431fe5b4c826dea8cae54a63d8c54838ad9))

Feature
* Add bolt.contrib.defer ([`6a0527f`](https://github.com/mcbeet/bolt/commit/6a0527f4696081a168a5adbfbb6a5f74d4853c4b))
* Add CommandCollector ([`a07cedd`](https://github.com/mcbeet/bolt/commit/a07cedd2e4636b50494ff7cdd914050d194fe922))
* Disable mecha.contrib.inline_function_tag by default ([`a9bf8bf`](https://github.com/mcbeet/bolt/commit/a9bf8bfe3d7bb39d767c204e4f06a80cc4133d78))

Fix
* Reset token generator after discarding builtin identifier in interpolation ([`37f74bc`](https://github.com/mcbeet/bolt/commit/37f74bc8f9fbf60b0493bf8e158be678ced5f272))

Feature
* Interpolate advancement predicate ([`e4338b0`](https://github.com/mcbeet/bolt/commit/e4338b0f4004601daf9c86b169a3771f876cff16))

Fix
* Refactor interpolation ([`44c2d0e`](https://github.com/mcbeet/bolt/commit/44c2d0ed74c8100698fa75931df626c96329b820))

Fix
* Reset generator to prevent dropping tokens ([`6551578`](https://github.com/mcbeet/bolt/commit/65515786d6a941a2f4e94c4e8932c0dc90faa14f))
* Update deps ([`1a00f20`](https://github.com/mcbeet/bolt/commit/1a00f208fce10a37e2ef9003d478b8dddce30d73))

Fix
* Reported 0 errors message ([`16e64b7`](https://github.com/mcbeet/bolt/commit/16e64b77d5516fa04687f156ace6a4ee050be95b))
* Proper error for statements used as subcommands ([`647b1c6`](https://github.com/mcbeet/bolt/commit/647b1c6685f5653bf34fdc87fab7ce2a7edc6fba))