ESM: Ported all Hash and Checksum operations

test/tests/operations/Checksum.mjs

@@ -5,7 +5,7 @@
  * @copyright Crown Copyright 2018
  * @license Apache-2.0
  */
-import TestRegister from "../../TestRegister.js";
+import TestRegister from "../../TestRegister";
 
 const BASIC_STRING = "The ships hung in the sky in much the same way that bricks don't.";
 const UTF8_STR = "ნუ პანიკას";

test/tests/operations/Hash.mjs

@@ -5,7 +5,7 @@
  * @copyright Crown Copyright 2017
  * @license Apache-2.0
  */
-import TestRegister from "../../TestRegister.js";
+import TestRegister from "../../TestRegister";
 
 TestRegister.addTests([
     {