Upgrade Error Prone 2.22.0 -> 2.23.0 (#847)

See:
- https://github.com/google/error-prone/releases/tag/v2.23.0
- google/error-prone@v2.22.0...v2.23.0
- PicnicSupermarket/error-prone@v2.22.0-picnic-1...v2.23.0-picnic-1

error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/MockitoMockClassReference.java

@@ -71,7 +71,7 @@ private static boolean isTypeDerivableFromContext(MethodInvocationTree tree, Vis
     Tree parent = state.getPath().getParentPath().getLeaf();
     switch (parent.getKind()) {
       case VARIABLE:
-        return !ASTHelpers.hasNoExplicitType((VariableTree) parent, state)
+        return !ASTHelpers.hasImplicitType((VariableTree) parent, state)
             && MoreASTHelpers.areSameType(tree, parent, state);
       case ASSIGNMENT:
         return MoreASTHelpers.areSameType(tree, parent, state);

pom.xml

@@ -201,7 +201,7 @@
         <version.auto-value>1.10.4</version.auto-value>
         <version.error-prone>${version.error-prone-orig}</version.error-prone>
         <version.error-prone-fork>v${version.error-prone-orig}-picnic-1</version.error-prone-fork>
-        <version.error-prone-orig>2.22.0</version.error-prone-orig>
+        <version.error-prone-orig>2.23.0</version.error-prone-orig>
         <version.error-prone-slf4j>0.1.20</version.error-prone-slf4j>
         <version.guava-beta-checker>1.0</version.guava-beta-checker>
         <version.jdk>11</version.jdk>