Release v1.30.0 (#569)

This commit serves as the v1.30.0 release.

The commit merged in (#567) was never tagged and released as v1.30.0 as
a bug was found in that commit before we tagged a release for it. This commit
contains the fix for the aforementioned bug.

This release contains the following changes:
- AddTemplate template option.
- thriftbreak: support for changed types, new files, and optional JSON output.
- String() performance improvements for string type definitions.

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [1.30.0] - 2023-04-04
+## [1.30.0] - 2023-04-06
 ### Added
 - AddTemplate template option.
 - thriftbreak: support for changed types, new files, and optional JSON output.