Upgrade packages (#14588)

We need to pull in Dart 2 compliant mockito

Fixes #14532

diff --git a/examples/flutter_gallery/pubspec.yaml b/examples/flutter_gallery/pubspec.yaml
index 9aed97a..d127050 100644
--- a/examples/flutter_gallery/pubspec.yaml
+++ b/examples/flutter_gallery/pubspec.yaml
@@ -45,8 +45,8 @@
   logging: 0.11.3+1 # TRANSITIVE DEPENDENCY
   matcher: 0.12.1+4 # TRANSITIVE DEPENDENCY
   meta: 1.1.1 # TRANSITIVE DEPENDENCY
-  mime: 0.9.5 # TRANSITIVE DEPENDENCY
-  mockito: 2.2.1 # TRANSITIVE DEPENDENCY
+  mime: 0.9.6 # TRANSITIVE DEPENDENCY
+  mockito: 2.2.2 # TRANSITIVE DEPENDENCY
   multi_server_socket: 1.0.1 # TRANSITIVE DEPENDENCY
   node_preamble: 1.4.0 # TRANSITIVE DEPENDENCY
   package_config: 1.0.3 # TRANSITIVE DEPENDENCY
@@ -66,12 +66,12 @@
   stack_trace: 1.9.1 # TRANSITIVE DEPENDENCY
   stream_channel: 1.6.3 # TRANSITIVE DEPENDENCY
   term_glyph: 1.0.0 # TRANSITIVE DEPENDENCY
-  test: 0.12.30+1 # TRANSITIVE DEPENDENCY
+  test: 0.12.30+2 # TRANSITIVE DEPENDENCY
   typed_data: 1.1.4 # TRANSITIVE DEPENDENCY
-  utf: 0.9.0+3 # TRANSITIVE DEPENDENCY
+  utf: 0.9.0+4 # TRANSITIVE DEPENDENCY
   vector_math: 2.0.5 # TRANSITIVE DEPENDENCY
-  vm_service_client: 0.2.4 # TRANSITIVE DEPENDENCY
-  watcher: 0.9.7+6 # TRANSITIVE DEPENDENCY
+  vm_service_client: 0.2.4+1 # TRANSITIVE DEPENDENCY
+  watcher: 0.9.7+7 # TRANSITIVE DEPENDENCY
   web_socket_channel: 1.0.6 # TRANSITIVE DEPENDENCY
   yaml: 2.1.13 # TRANSITIVE DEPENDENCY