TS: declare Uint8Array<ArrayBuffer> over generic Uint8Array (#20)

And add lint TS rule to enforce declaring `Uint8Array<ArrayBuffer>`.

This change is to limit the need to downcast Uint8Array in output
when using them with e.g. WebCrypto and Blobs,
following an incompatible interface change between ArrayBuffer
and ArrayBufferLike (enforced in TS v5.9).

Author: larabr

.eslintrc.cjs

@@ -22,7 +22,8 @@ module.exports = {
     '@typescript-eslint',
     'chai-friendly',
     'import',
-    'unicorn'
+    'unicorn',
+    '@protontech/enforce-uint8array-arraybuffer'
   ],
 
   'settings': {
@@ -139,6 +140,7 @@ module.exports = {
     '@typescript-eslint/no-unused-expressions': 0,
     'chai-friendly/no-unused-expressions': [2, { 'allowShortCircuit': true }],
     'unicorn/switch-case-braces': ['error', 'avoid'],
+    '@protontech/enforce-uint8array-arraybuffer/enforce-uint8array-arraybuffer': 'error',
 
     // Custom warnings:
     'no-console': 1