Hyphenated property names generate invalid Java identifiers

[zugaldia]

When generating Java code with InterfaceCodeGenerator version 5.2.0 on the https://github.com/flatpak/xdg-desktop-portal/blob/main/data/org.freedesktop.portal.PowerProfileMonitor.xml file, the following property produces incorrect code:

<property name="power-saver-enabled" type="b" access="read"/>

Problematic generated code:

@DBusBoundProperty
boolean ispower-saver-enabled();

Build error:

Execution failed for task ':sdk:compileJava'.
> Compilation failed; see the compiler output below.
  /[redacted]/stargate/sdk/src/main/generated/org/freedesktop/portal/PowerProfileMonitor.java:14: error: = expected
      boolean ispower-saver-enabled();
                     ^

The exact setup can be seen here (Stargate is a Kotlin library that provides JVM applications with access to XDG Desktop Portals on Linux).

I've seen other generation errors with other XDG Portals related XML files. I'll open separate tickets for easier tracking.

[zugaldia]

Fixed in the latest 6.0.0 snapshot, see #304 (comment).