add messages to plainJSErrors

Author: a-tarasyuk

src/compiler/program.ts

@@ -967,6 +967,8 @@ namespace ts {
         Diagnostics.extends_clause_already_seen.code,
         Diagnostics.let_declarations_can_only_be_declared_inside_a_block.code,
         Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations.code,
+        Diagnostics.Class_constructor_may_not_be_a_generator.code,
+        Diagnostics.Class_constructor_may_not_be_an_accessor.code,
     ]);
 
     /**