Update charted to 0.4.8 and roll

packages/utf/test/expect.dart

+import 'package:test/test.dart' as ut;
+
+void listEquals(a, b, [String message]) {
+  ut.expect(b, ut.orderedEquals(a), reason: message);
+}
+
+void equals(a, b) {
+  ut.expect(b, ut.equals(a));
+}
+
+void stringEquals(String a, String b, [String message]) {
+  ut.expect(b, ut.equals(a), reason: message);
+}
+
+void isFalse(value) {
+  ut.expect(value, ut.isFalse);
+}