Update pubspecs and dependencies to get pkgbuild tests working.

third_party/pkg/angular/test/filter/lowercase_spec.dart

Index: third_party/pkg/angular/test/filter/lowercase_spec.dart
diff --git a/third_party/pkg/angular/test/filter/lowercase_spec.dart b/third_party/pkg/angular/test/filter/lowercase_spec.dart
deleted file mode 100644
index 575deb7cee131b2296fc870383b8eed08dd382a9..0000000000000000000000000000000000000000
--- a/third_party/pkg/angular/test/filter/lowercase_spec.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-library lowercase_spec;
-
-import '../_specs.dart';
-
-main() => describe('lowercase', () {
-  it('should convert string to lowercase', inject((Parser parse, FilterMap filters) {
-    expect(parse('null | lowercase').eval(null, filters)).toEqual(null);
-    expect(parse('"FOO" | lowercase').eval(null, filters)).toEqual('foo');
-  }));
-});