Do not report "unused parameter" for parameters of platform declarations. Do
not allow platform class constructors to have val/var parameters or have an
explicit delegation call to another constructor. Do not allow platform classes
to have 'init' blocks.
Also suppress the "supertype not initialized" error for platform classes: the
supertype should be initialized in the impl class
The `@SinceKotlin("X.Y.Z")` annotation now hides a particular declaration from
resolution when the API version specified by the `-api-version` option is
_less_ than X.Y.Z. The comparison is performed as for versions in Maven:
MavenComparableVersion is in fact a copy of
org.apache.maven.artifact.versioning.ComparableVersion.
Also support "!API_VERSION" directive in diagnostic tests
#KT-14298 Fixed
To simplify migration from 1.0 to 1.1, do not allow data classes to
automatically implement abstract equals/hashCode/toString declared in
super-interfaces (KT-11306) if "-language-version 1.0" is specified
This test checks that the correct LanguageFeatureSettings instance (not
LanguageVersion.LATEST) is being passed to
createContainerForLazyLocalClassifierAnalyzer
