* drop null serialization in tilejson endpoints ([#261](https://github.com/urbica/martin/issues/261)) ([cee9b2b](https://github.com/urbica/martin/commit/cee9b2bd8ca5e7303a416ada766616d864ec1f6a))
### Features
* add bounds to tilejson endpoints ([#260](https://github.com/urbica/martin/issues/260)) (h/t [@jaspervercnocke](https://github.com/jaspervercnocke)) ([40b0a0c](https://github.com/urbica/martin/commit/40b0a0c26aa93549fc1497faaf848049e1015070))
* add composite sources support ([#184](https://github.com/urbica/martin/issues/184)) ([3c01125](https://github.com/urbica/martin/commit/3c01125fc5ddb9c52aece570ae043e651c7a397c))
* add minzoom and maxzoom support ([#265](https://github.com/urbica/martin/issues/265)) ([194a83e](https://github.com/urbica/martin/commit/194a83e63f763323865a7f59e410e2931ce46e0a))
* add server heartbeat for monitoring the service health ([#168](https://github.com/urbica/martin/issues/168)) (h/t [@yamaszone](https://github.com/yamaszone)) ([fce1a9e](https://github.com/urbica/martin/commit/fce1a9e722692b24294c3766055602768112d392))
* add support for complex geometries ([#218](https://github.com/urbica/martin/issues/218)) (h/t [@christianversloot](https://github.com/christianversloot)) ([8b5fbf9](https://github.com/urbica/martin/commit/8b5fbf956545746d0f28e66fb73275ad46945259))
* add ssl/tls support ([#268](https://github.com/urbica/martin/issues/268)) (h/t [@kapcsandi](https://github.com/kapcsandi)) ([7ad7f1a](https://github.com/urbica/martin/commit/7ad7f1ab8b8fec856ca8f6f50d2ca7f897a10274))
* fix tiles attribute in tilejson when using x-rewrite-url ([#266](https://github.com/urbica/martin/issues/266)) ([f2d56c2](https://github.com/urbica/martin/commit/f2d56c2f7d28d858c09cab90ff13789d595ba6da))
- 🐛 use dashes in CLI args instead of underscore ([13bec40](https://github.com/urbica/martin/commit/13bec40)), closes [#21](https://github.com/urbica/martin/issues/21)