Tapestry 5.5.0 is the new major release. To upgrade, just update the dependency in your build configuration (Maven POM, Gradle build script, etc.) – or Download the new JAR file -- and the new version should just work.
The main new features are:
- Support for Java 12 bytecode.
- Support for on-the-fly TypeScript compilation in the tapestry-webresources module.
- Ability to use Twitter Bootstrap 3 out-of-the-box (default and same version provided by Tapestry 5.4), Twitter Bootstrap 4 out-of-the-box (introduced in Tapestry 5.5.0) or provide your own CSS (in this case, Tapestry doesn't provide any CSS at all).
- The If component now has a then parameter.
See more details at the release notes.