Merge pull request #523 from kodemartin/rust-bindings

Add rustpostal to unofficial bindings

Author: albarrentine

README.md

@@ -383,6 +383,7 @@ Libpostal is designed to be used by higher-level languages.  If you don't see yo
 - LuaJIT: [lua-resty-postal](https://github.com/bungle/lua-resty-postal)
 - Perl: [Geo::libpostal](https://metacpan.org/pod/Geo::libpostal)
 - Elixir: [Expostal](https://github.com/SweetIQ/expostal)
+- Rust: [rustpostal](https://crates.io/crates/rustpostal)
 
 **Database extensions**