worker: simplify filename checks

Replace a couple of checks with a single regular expression.

PR-URL: #27233
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

lib/internal/worker.js

@@ -68,11 +68,7 @@ class Worker extends EventEmitter {
                                      options.execArgv);
     }
     if (!options.eval) {
-      if (!path.isAbsolute(filename) &&
-          !filename.startsWith('./') &&
-          !filename.startsWith('../') &&
-          !filename.startsWith('.' + path.sep) &&
-          !filename.startsWith('..' + path.sep)) {
+      if (!path.isAbsolute(filename) && !/^\.\.?[\\/]/.test(filename)) {
         throw new ERR_WORKER_PATH(filename);
       }
       filename = path.resolve(filename);