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 2cddba3..f721db0 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
@@ -81,6 +81,9 @@
   bool get hasRequired => _wrappedUnit.hasRequired;
 
   @override
+  bool get hasVisibleForTemplate => _wrappedUnit.hasVisibleForTemplate;
+
+  @override
   bool get hasVisibleForTesting => _wrappedUnit.hasVisibleForTesting;
 
   @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 b73852d..4d58f3e 100644
--- a/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart
+++ b/angular_analyzer_plugin/lib/src/facade/exports_import_element.dart
@@ -60,6 +60,9 @@
   bool get hasRequired => _wrappedImport.hasRequired;
 
   @override
+  bool get hasVisibleForTemplate => _wrappedImport.hasVisibleForTemplate;
+
+  @override
   bool get hasVisibleForTesting => _wrappedImport.hasVisibleForTesting;
 
   @override