update to eslint v9

Author: k-yle

.npmrc

@@ -0,0 +1 @@
+legacy-peer-deps=true

eslint.config.mjs

@@ -0,0 +1,13 @@
+import tsEslint from 'typescript-eslint';
+import config from 'eslint-config-kyle';
+
+export default tsEslint.config(...config, {
+  rules: {
+    'vitest/expect-expect': 'off', // we use node:assert
+    'unicorn/prefer-node-protocol': 'off', // not supported in node v10
+    'unicorn/prefer-event-target': 'off', // not supported in node v10
+    'unicorn/prefer-string-replace-all': 'off', // not supported in node v10
+    'unicorn/prevent-abbreviations': 'off', // don't want to rename code ported from C++
+    '@typescript-eslint/no-unsafe-declaration-merging': 'off', // required for EventEmitter types
+  },
+});