Chore/support for intellij 2023.1

src/main/resources/META-INF/plugin.xml

 <idea-plugin>
     <id>org.jastadd.JastAddGrammar</id>
     <name>JastAdd Grammar Language</name>
-    <vendor email="johannes.mey@tu-dresden.de" url="jastadd.org">The JastAdd Team</vendor>
-
+    <vendor email="johannes.mey@tu-dresden.de" url="jastadd.org">Johannes Mey</vendor>
 
     <!-- please see https://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/plugin_compatibility.html
          on how to target different products -->
@@ -32,7 +31,7 @@
         <completion.contributor language="JastAddGrammar"
                                 implementationClass="org.jastadd.tooling.grammar.GrammarCompletionContributor"/>
 
-        <psi.referenceContributor implementation="org.jastadd.tooling.grammar.GrammarReferenceContributor"/>
+        <psi.referenceContributor language="JastAddGrammar" implementation="org.jastadd.tooling.grammar.GrammarReferenceContributor"/>
 
 
         <lang.refactoringSupport language="JastAddGrammar"
@@ -80,7 +79,7 @@
 
         <colorSettingsPage implementation="org.jastadd.tooling.java.JavaColorSettingsPage"/>
 
-        <psi.referenceContributor implementation="org.jastadd.tooling.aspect.AspectReferenceContributor"/>
+        <psi.referenceContributor language="JastAddAspect" implementation="org.jastadd.tooling.aspect.AspectReferenceContributor"/>
 
         <lang.elementManipulator forClass="org.jastadd.tooling.aspect.psi.JastAddAspectAstTypeName"
                                  implementationClass="org.jastadd.tooling.aspect.psi.JastAddAspectAstTypeNameManipulator"/>