Merge pull request #58 from browserstack/AXE-200_latency_issue

fix: AXE-200 Fixed rule level latency issue

Author: ansh21

lib/core/base/rule.js

@@ -299,11 +299,12 @@ Rule.prototype.run = function run(context, options = {}, resolve, reject) {
   // See https://github.com/dequelabs/axe-core/pull/1172 for discussion and details.
   q.defer(res => setTimeout(res, 0));
 
-  if (options.performanceTimer) {
-    this._logRulePerformance();
-  }
-
-  q.then(() => resolve(ruleResult)).catch(error => reject(error));
+  q.then(() => {
+    if (options.performanceTimer) {
+      this._logRulePerformance();
+    }
+    resolve(ruleResult);
+  }).catch(error => reject(error));
 };
 
 /**