fix attribute filter

Author: Abhishek Bindra

lib/core/utils/get-selector.js

@@ -83,7 +83,7 @@ function countSort(a, b) {
 function filterAttributes(at) {
   return (
     !ignoredAttributes.includes(at.name) &&
-    /data-percy-/.test(at.name) &&
+    !/data-percy-/.test(at.name) &&
     at.name.indexOf(':') === -1 &&
     (!at.value || at.value.length < MAXATTRIBUTELENGTH)
   );