Bypass pub constraint validation for dartfix 0.1.7.

Using this in lieu of the previous dartfix pubspec commit for 0.1.7;
pub no longer allows pinning to specific versions of dependencies.
So, create a constraint that technically allows a range but in
practice won't.

Change-Id: Ifc5cb1eeb733d1aafbf88c1d4cd7a602834e5b89
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/147220
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Janice Collins <jcollins@google.com>
Auto-Submit: Janice Collins <jcollins@google.com>

Author: jcollins-g

pkg/dartfix/pubspec.yaml

@@ -14,7 +14,7 @@ executables:
 dependencies:
   # Pin to an exact version of analysis_server_client because the edit.dartfix
   # protocol is experimental and will continue to evolve.
-  analysis_server_client: 1.1.3
+  analysis_server_client: '>=1.1.3 <1.1.4'
   args: ^1.4.0
   cli_util: ^0.1.3
   path: ^1.7.0

pkg/dartfix/test/src/client_version_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:test/test.dart';
 
-import 'src/client_version_test.dart' as client_version;
 import 'src/driver_example_test.dart' as driver_example;
 import 'src/driver_exclude_test.dart' as driver_exclude;
 import 'src/driver_help_test.dart' as driver_help;
@@ -16,7 +15,6 @@ import 'src/migrate_command_test.dart' as migrate_command_test;
 import 'src/options_test.dart' as options_test;
 
 void main() {
-  group('version', client_version.main);
   group('driver', driver_example.main);
   group('driver', driver_exclude.main);
   group('driver', driver_help.main);