When refactoring, structure your PR to make it easy to review and don't
hestitate to split it into multiple small, focused PRs.
-The Minimal Supported Rust Version is 1.30.0 (enforced by our Travis and
-GitHub Actions).
+The Minimal Supported Rust Version is 1.36.0 (enforced by our GitHub Actions).
Commits should cover both the issue fixed and the solution's rationale.
These [guidelines](https://chris.beams.io/posts/git-commit/) should be kept in mind.
cargo clippy
```
+Significant structures that users persist should always have their serialization methods (usually
+`Writeable::write` and `ReadableArgs::read`) begin with
+`write_ver_prefix!()`/`read_ver_prefix!()` calls, and end with calls to
+`write_tlv_fields!()`/`read_tlv_fields!()`.
+
+Updates to the serialized format which has implications for backwards or forwards compatibility
+must be included in release notes.
+
Security
--------