test: use assert regexp in tls no cert test

Replace the `assert.throws` second argument from a Type to a `RegExp`
matching the entire error message.
Error message changes are `semver-major`, so we assert their content.

PR-URL: #12891
Refs: #12603
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: David Cai <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: James M Snell <[email protected]>

test/parallel/test-tls-no-cert-required.js

@@ -20,7 +20,8 @@ tls.createServer(assert.fail)
 tls.createServer({})
   .listen(0, common.mustCall(close));
 
-assert.throws(() => tls.createServer('this is not valid'), TypeError);
+assert.throws(() => tls.createServer('this is not valid'),
+              /^TypeError: options must be an object$/);
 
 tls.createServer()
   .listen(0, common.mustCall(close));