Mark analyzer_cli as strong-mode clean

pkg/analyzer_cli/test/driver_test.dart

Index: pkg/analyzer_cli/test/driver_test.dart
diff --git a/pkg/analyzer_cli/test/driver_test.dart b/pkg/analyzer_cli/test/driver_test.dart
index e54960317875f6537eb008f021d14ef94975ee57..58b5c1a142fe50e83692e08bdbd6ae6efaae4e70 100644
--- a/pkg/analyzer_cli/test/driver_test.dart
+++ b/pkg/analyzer_cli/test/driver_test.dart
@@ -518,7 +518,7 @@ class TestPlugin extends Plugin {
 }
 
 class TestProcessor extends OptionsProcessor {
-  Map<String, YamlNode> options;
+  Map<String, Object> options;
   Exception exception;
 
   @override
@@ -527,8 +527,7 @@ class TestProcessor extends OptionsProcessor {
   }
 
   @override
-  void optionsProcessed(
-      AnalysisContext context, Map<String, YamlNode> options) {
+  void optionsProcessed(AnalysisContext context, Map<String, Object> options) {
     this.options = options;
   }
 }