Fix search attributes

package.json

@@ -17,7 +17,7 @@
     "@ldapjs/controls": "2.0.0-rc.1",
     "@ldapjs/dn": "1.0.0-rc.1",
     "@ldapjs/filter": "2.0.0-rc.5",
-    "@ldapjs/messages": "1.0.0-rc.2",
+    "@ldapjs/messages": "1.0.0-rc.3",
     "@ldapjs/protocol": "^1.0.0",
     "abstract-logging": "^2.0.0",
     "assert-plus": "^1.0.0",

test/client.test.js

@@ -1253,7 +1253,7 @@ tap.test('GH-21 binary attributes', function (t) {
 tap.test('GH-23 case insensitive attribute filtering', function (t) {
   const opts = {
     filter: '(objectclass=*)',
-    attributes: ['@Cn']
+    attributes: ['Cn']
   }
   t.context.client.search('cn=test, ' + SUFFIX, opts, function (err, res) {
     t.error(err)

test/laundry.test.js

@@ -118,7 +118,7 @@ tap.test('GH-49 Client errors on bad attributes', function (t) {
   const searchOpts = {
     filter: 'cn=*ogo*',
     scope: 'one',
-    attributes: '@dn'
+    attributes: 'dn'
   }
   return search(t, searchOpts)
 })