test: cleanup test-util-inherits.js

Replaced constructor with regular expression for assert.throw().

Author: RobotMermaid

test/parallel/test-util-inherits.js

@@ -75,6 +75,12 @@ assert.strictEqual(e.e(), 'e');
 assert.strictEqual(e.constructor, E);
 
 // should throw with invalid arguments
-assert.throws(function() { inherits(A, {}); }, TypeError);
-assert.throws(function() { inherits(A, null); }, TypeError);
-assert.throws(function() { inherits(null, A); }, TypeError);
+assert.throws(function() {
+  inherits(A, {});
+}, /^TypeError: The super constructor to "inherits" must have a prototype$/);
+assert.throws(function() {
+  inherits(A, null);
+}, /^TypeError: The super constructor to "inherits" must not be null or undefined$/); // eslint-disable-line max-len
+assert.throws(function() {
+  inherits(null, A);
+}, /^TypeError: The constructor to "inherits" must not be null or undefined$/);