changelog: Add entry about Rust
to be used by VM implementations.
- Deprecated: [[#196](https://github.com/ethereum/evmc/pull/196)]
The `EVMC_CONSTANTINOPLE2` revision name is deprecated, replaced with `EVMC_PETERSBURG`.
+- Added: [[#201](https://github.com/ethereum/evmc/pull/201), [#202](https://github.com/ethereum/evmc/pull/202), [#233](https://github.com/ethereum/evmc/pull/233)]
+ Initial and rough bindings for Rust. It is possible to implement an
+ EVMC VM in Rust utilising some helpers.
## [6.1.1] - 2019-02-13
