Update test package (#4198)

packages/flutter_driver/pubspec.yaml

@@ -20,6 +20,6 @@ dependencies:
     path: '../flutter_test'
 
 dev_dependencies:
-  test: 0.12.13+1
+  test: 0.12.13+4
   mockito: '^0.11.0'
   quiver: '^0.21.4'

packages/flutter_test/pubspec.yaml

@@ -5,7 +5,7 @@ dependencies:
   # The flutter tools depend on very specific internal implementation
   # details of the 'test' package, which change between versions, so
   # here we pin it precisely to avoid version skew across our packages.
-  test: 0.12.13+1
+  test: 0.12.13+4
 
   # We don't actually depend on 'analyzer', but 'test' and 'flutter_tools' do.
   # We pin the version of analyzer we depend on to avoid version skew across our

packages/flutter_tools/pubspec.yaml

@@ -32,7 +32,7 @@ dependencies:
   # We depend on very specific internal implementation details of the
   # 'test' package, which change between versions, so here we pin it
   # precisely.
-  test: 0.12.13+1
+  test: 0.12.13+4
 
   # Pinned in flutter_test as well.
   analyzer: 0.27.4-alpha.6