perf_hooks,trace_events: use stricter equality

There is no need to use loose equality on these checks because
undefined is caught by the preceding typeof check.

PR-URL: #28166
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

lib/perf_hooks.js

@@ -332,7 +332,7 @@ class PerformanceObserver extends AsyncResource {
   }
 
   observe(options) {
-    if (typeof options !== 'object' || options == null) {
+    if (typeof options !== 'object' || options === null) {
       throw new ERR_INVALID_ARG_TYPE('options', 'Object', options);
     }
     if (!Array.isArray(options.entryTypes)) {

lib/trace_events.js

@@ -73,7 +73,7 @@ class Tracing {
 }
 
 function createTracing(options) {
-  if (typeof options !== 'object' || options == null)
+  if (typeof options !== 'object' || options === null)
     throw new ERR_INVALID_ARG_TYPE('options', 'object', options);
 
   if (!Array.isArray(options.categories)) {