Update JS dependencies for api augment and e2e tests (#1965)

# Goal
The goal of this PR is to get Api Augment to Polkadotjs v11+


# Discussion
- Update eslint to flat config files and ready for v9
- Polkadotjs/api v11
- Node to v20.12.2
- Other small package updates

Author: wilwade

e2e/.eslintrc.cjs

@@ -1 +1 @@
-20.11.1
+20.12.2

e2e/.node-version

@@ -1 +1 @@
-nodejs 20.11.1
+nodejs 20.12.2

e2e/.tool-versions

@@ -0,0 +1,35 @@
+// @ts-check
+
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import mochaPlugin from 'eslint-plugin-mocha';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.strict,
+  ...tseslint.configs.stylistic,
+  mochaPlugin.configs.flat.recommended,
+  {
+    rules: {
+      '@typescript-eslint/no-empty-interface': 'off',
+      '@typescript-eslint/no-unused-vars': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-inferrable-types': 'off',
+      '@typescript-eslint/no-extraneous-class': 'off',
+      semi: ['error', 'always'],
+      'mocha/no-setup-in-describe': 'off',
+      'no-use-before-define': 'off',
+      'no-unused-vars': 'off',
+      'no-var': 'error',
+      'id-length': [
+        'error',
+        {
+          exceptionPatterns: ['[i-k]', 'e', 'c', 'x', 'y', 'r', 's', 'v', 'f', '_'],
+          properties: 'never',
+        },
+      ],
+      'allow-namespace': 'off',
+    },
+  }
+);

e2e/eslint.config.mjs

@@ -31,7 +31,7 @@ describe('MSA Initializer Load Tests', function () {
     let blockNumber = await getBlockNumber();
     console.log('Starting Block Number:', blockNumber);
 
-    let signatureCallTests: Array<KeyringPair> = [];
+    let signatureCallTests: KeyringPair[] = [];
 
     // Make 50k signatures via 50k/2 loops
     const loopCount = 25_000;
@@ -89,7 +89,7 @@ async function generateMsas(count: number = 1): Promise<GeneratedMsa[]> {
   const fundingSource = getFundingSource('load-signature-registry');
 
   // Create and fund the control keys
-  const controlKeyPromises: Array<Promise<KeyringPair>> = [];
+  const controlKeyPromises: Promise<KeyringPair>[] = [];
   let devAccountNonce = await getNonce(fundingSource);
   const ed = await getExistentialDeposit();
   for (let i = 0; i < count; i++) {
@@ -100,7 +100,7 @@ async function generateMsas(count: number = 1): Promise<GeneratedMsa[]> {
   const controlKeys = await Promise.all(controlKeyPromises);
 
   // Create the msas
-  const msaPromises: Array<Promise<GeneratedMsa>> = [];
+  const msaPromises: Promise<GeneratedMsa>[] = [];
   for (let i = 0; i < count; i++) {
     msaPromises.push(
       createMsa(controlKeys[i]).then((id) => ({