fix hello test to test if modules is an array

Author: sjpotter

packages/client/lib/commands/HELLO.spec.ts

@@ -63,7 +63,7 @@ describe('HELLO', () => {
     assert.equal(typeof reply.id, 'number');
     assert.equal(reply.mode, 'standalone');
     assert.equal(reply.role, 'master');
-    assert.equal('modules' in reply, true);
+    assert.ok(reply.modules instanceof Array);
   }, {
     ...GLOBAL.SERVERS.OPEN,
     minimumDockerVersion: [6, 2]