Upgrade to JavaFX 11+, Latest Gradle, JDK 11-17, Latest Groovy JavaFX Plugin, etc.

@aalmiray An interest in updating this project?

I can't get it to build and run on macOS.

sdk use java 8.0.302.fx-librca
./gradlew run --info

gets me this far:

Exception in Application init method
[main] ERROR griffon.core.GriffonExceptionHandler - Uncaught Exception. Stacktrace was sanitized. Set System property 'griffon.full.stacktrace' to 'true' for full report.
java.lang.RuntimeException: Exception in Application init method
Caused by: griffon.exceptions.InstanceNotFoundException: Could not find an instance of type griffon.core.PlatformHandler
        at griffon.javafx.AbstractJavaFXGriffonApplication.initialize(AbstractJavaFXGriffonApplication.java:314)
        at griffon.javafx.JavaFXGriffonApplication.afterInit(JavaFXGriffonApplication.java:75)
        at griffon.javafx.JavaFXGriffonApplication.init(JavaFXGriffonApplication.java:71)
Caused by: com.google.inject.ProvisionException: Unable to provision, see the following errors:

1) Error in custom provider, griffon.exceptions.TypeNotFoundException: Could not find type griffon.core.PlatformHandler
  while locating org.codehaus.griffon.runtime.core.PlatformHandlerProvider
  at org.codehaus.griffon.runtime.injection.GuiceInjector$1.handleBinding(GuiceInjector.java:94)
  while locating griffon.core.PlatformHandler

1 error
        at com.google.inject.internal.InternalProvisionException.toProvisionException(InternalProvisionException.java:226)
        at com.google.inject.internal.InjectorImpl$1.get(InjectorImpl.java:1053)
        at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1086)
        ... 3 more
Caused by: griffon.exceptions.TypeNotFoundException: Could not find type griffon.core.PlatformHandler
        at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:85)
        at com.google.inject.internal.BoundProviderFactory.provision(BoundProviderFactory.java:77)
        at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:66)
        at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:112)
        at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:120)
        at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:66)
        at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61)
        at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61)
        at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
        at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:148)
        at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:39)
        at com.google.inject.internal.InjectorImpl$1.get(InjectorImpl.java:1050)
        ... 4 more
Caused by: java.lang.NoClassDefFoundError: com/apple/mrj/MRJAboutHandler
        ... 16 more
Caused by: java.lang.ClassNotFoundException: com.apple.mrj.MRJAboutHandler
        ... 16 more

> Task :run FAILED
:run (Thread[Task worker for ':',5,main]) completed. Took 3.13 secs.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/Users/sean/.sdkman/candidates/java/8.0.302.fx-librca/bin/java'' finished with non-zero exit value 1

aalmiray / groovy-console-fx

Upgrade to JavaFX 11+, Latest Gradle, JDK 11-17, Latest Groovy JavaFX Plugin, etc. #5