test: assert that invalidcmd throws error code

Update invalidcmd test case in test-child-process-spawn-typeerror to
assert on specific expected error code.

PR-URL: nodejs#23942
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-child-process-spawn-typeerror.js

@@ -33,12 +33,11 @@ const invalidArgValueError =
   common.expectsError({ code: 'ERR_INVALID_ARG_VALUE', type: TypeError }, 14);
 
 const invalidArgTypeError =
-  common.expectsError({ code: 'ERR_INVALID_ARG_TYPE', type: TypeError }, 12);
+  common.expectsError({ code: 'ERR_INVALID_ARG_TYPE', type: TypeError }, 13);
 
 assert.throws(function() {
-  const child = spawn(invalidcmd, 'this is not an array');
-  child.on('error', common.mustNotCall());
-}, TypeError);
+  spawn(invalidcmd, 'this is not an array');
+}, invalidArgTypeError);
 
 // Verify that valid argument combinations do not throw.
 spawn(cmd);