test: use regex error check in test-crypto-random

Replace constructor in assert.throws() to a regular expression to check
the error thrown in a test in test-crypto-random.

PR-URL: #14273
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-crypto-random.js

@@ -32,4 +32,4 @@ const expectedErrorRegexp = /^TypeError: size must be a number >= 0$/;
 // length exceeds max acceptable value"
 assert.throws(function() {
   crypto.randomBytes((-1 >>> 0) + 1);
-}, TypeError);
+}, /^TypeError: size must be a number >= 0$/);