chore(pubspec): updated pubspec.lock

Author: pavelgj

pubspec.lock

@@ -52,7 +52,7 @@ packages:
   shadow_dom:
     description: shadow_dom
     source: hosted
-    version: "0.9.1"
+    version: "0.9.2"
   source_maps:
     description: source_maps
     source: hosted
@@ -64,7 +64,7 @@ packages:
   unittest:
     description: unittest
     source: hosted
-    version: "0.9.2+1"
+    version: "0.9.3"
   unmodifiable_collection:
     description: unmodifiable_collection
     source: hosted