ESM: Added remaining Base64 ops and created a Base64 library. Added the prefer-const eslint rule.

src/core/operations/index.mjs

@@ -1,7 +1,13 @@
 import ToBase64 from "./ToBase64";
 import FromBase64 from "./FromBase64";
+import ToBase32 from "./ToBase32";
+import FromBase32 from "./FromBase32";
+import ShowBase64Offsets from "./ShowBase64Offsets";
 
-export default [
+export {
     ToBase64,
-    FromBase64
-];
+    FromBase64,
+    ToBase32,
+    FromBase32,
+    ShowBase64Offsets
+};