Add erlang binding
As a C library, bindings can be made to call H3 functions from different programming languages. This page lists different bindings currently available. Contributions to this list are welcome, please feel free to open a [pull request](https://github.com/uber/h3/tree/master/docs/community/bindings.md).
+## Erlang
+
+- [helium/erlang-h3](https://github.com/helium/erlang-h3)
+
## Java
- [uber/h3-java](https://github.com/uber/h3-java)
