Update all Angular libs (run update_all.sh).

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

+library lowercase_spec;
+
+import '../_specs.dart';
+
+void main() {
+  describe('lowercase', () {
+    it('should convert string to lowercase', inject((Parser parse, FormatterMap formatters) {
+      expect(parse('null | lowercase').eval(null, formatters)).toEqual(null);
+      expect(parse('"FOO" | lowercase').eval(null, formatters)).toEqual('foo');
+    }));
+  });
+}