Add overrides for hasVisibleForTemplate, which was introduced in https://github.com/dart-lang/sdk/commit/7818db20a791f4106f06bfca06c23b4bd0e79b04 (#612)

diff --git a/angular_analyzer_plugin/lib/src/facade/exports_compilation_unit_element.dart b/angular_analyzer_plugin/lib/src/facade/exports_compilation_unit_element.dart
index 538fece..817658f 100644
--- a/angular_analyzer_plugin/lib/src/facade/exports_compilation_unit_element.dart
+++ b/angular_analyzer_plugin/lib/src/facade/exports_compilation_unit_element.dart

@@ -40,6 +40,9 @@
   LibraryElement get enclosingElement => libraryFacade;
 
   @override
+  bool get hasVisibleForTemplate => _wrappedUnit.hasVisibleForTemplate;
+
+  @override
   int get id => _wrappedUnit.id;
 
   @override

diff --git a/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart b/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart
index 2579241..f136e2c 100644
--- a/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart
+++ b/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart

@@ -42,6 +42,9 @@
   LibraryElement get enclosingElement => libraryFacade;
 
   @override
+  bool get hasVisibleForTemplate => _wrappedImport.hasVisibleForTemplate;
+
+  @override
   int get id => _wrappedImport.id;
 
   @override