ReflectExtensions.invoke does not work for static methods in newer java versions

[cdietrich]

ReflectExtensions.invoke does not work for static methods in newer java versions

java.lang.IllegalArgumentException: non-null object for public static void MyFile.main(java.lang.String[])
	at java.base/java.lang.reflect.AccessibleObject.canAccess(AccessibleObject.java:466)
	at org.eclipse.xtext.xbase.lib.util.ReflectExtensions.invoke(ReflectExtensions.java:122)
	at org.xtext.scripting.tests.ExecutionTest.lambda$0(ExecutionTest.java:62)
	at org.eclipse.xtext.xbase.testing.CompilationTestHelper.compile(CompilationTestHelper.java:248)
	at org.eclipse.xtext.xbase.testing.CompilationTestHelper.compile(CompilationTestHelper.java:197)
	at org.xtext.scripting.tests.ExecutionTest.compileAndExecuteMainAndExpect(ExecutionTest.java:76)
	at org.xtext.scripting.tests.ExecutionTest.testHelloWorld(ExecutionTest.java:42)