test: change assert.equal to assert.strictEqual

PR-URL: #9946 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>

Author: Aileen

test/parallel/test-cluster-send-handle-twice.js

@@ -14,7 +14,7 @@ if (cluster.isMaster){
 for(vari=0;i<workers.toStart;++i){
 varworker=cluster.fork();
 worker.on('exit',function(code,signal){
-assert.equal(code,0,'Worker exited with an error code');
+assert.strictEqual(code,0,'Worker exited with an error code');
 assert(!signal,'Worker exited by a signal');
 });
 }