Update pubspecs and dependencies to get pkgbuild tests working.

third_party/pkg/angular/lib/filter/json.dart

Index: third_party/pkg/angular/lib/filter/json.dart
diff --git a/third_party/pkg/angular/lib/filter/json.dart b/third_party/pkg/angular/lib/filter/json.dart
deleted file mode 100644
index f2c0efa80dfcf2c1c93dbf09fd12b6d27c6366f2..0000000000000000000000000000000000000000
--- a/third_party/pkg/angular/lib/filter/json.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-part of angular.filter;
-
-/**
- * Allows you to convert a JavaScript object into JSON string. This filter is
- * mostly useful for debugging.
- *
- * Usage:
- *
- *     {{ json_expression | json }}
- */
-@NgFilter(name:'json')
-class JsonFilter {
-  call(text) => JSON.encode(text);
-}