suggest dynamic and void when defining new compilation unit members

pkg/analysis_server/lib/src/services/completion/keyword_computer.dart

Index: pkg/analysis_server/lib/src/services/completion/keyword_computer.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/keyword_computer.dart b/pkg/analysis_server/lib/src/services/completion/keyword_computer.dart
index 24415bd5a58187abe407929d9f75958e8c0370e3..6e0b99c831432392071a73497fd5c70484fd49f4 100644
--- a/pkg/analysis_server/lib/src/services/completion/keyword_computer.dart
+++ b/pkg/analysis_server/lib/src/services/completion/keyword_computer.dart
@@ -119,9 +119,11 @@ class _KeywordVisitor extends GeneralizingAstVisitor {
         Keyword.ABSTRACT,
         Keyword.CLASS,
         Keyword.CONST,
+        Keyword.DYNAMIC,
         Keyword.FINAL,
         Keyword.TYPEDEF,
-        Keyword.VAR
+        Keyword.VAR,
+        Keyword.VOID
       ], DART_RELEVANCE_HIGH);
     }
   }