chore: update eslint (#100)

eslint.config.mjs

@@ -0,0 +1,42 @@
+import eslint from '@eslint/js'
+import prettier from 'eslint-config-prettier'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: ['.eslint.config.mjs', 'node_modules/**', 'dist/**', 'build/**', 'coverage/**', '**/*.d.ts', '.idea/**', '.vscode/**'],
+  },
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  {
+    files: ['**/*.ts'],
+    languageOptions: {
+      parser: tseslint.parser,
+      parserOptions: {
+        project: './tsconfig.json',
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+      },
+    },
+    rules: {
+      'no-console': 'warn',
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        { ignoreRestSiblings: true, argsIgnorePattern: '^_', destructuredArrayIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+      '@typescript-eslint/no-unused-expressions': 'off',
+      'prefer-template': 'error',
+      'no-restricted-syntax': [
+        'error',
+        {
+          // Algosdk v2.x.x exports a malformed ES module and when using subscriber-ts in an ESM project
+          // the CJS module may be loaded, which may not fuly support all named exports.
+          // The easiest solution for now, is to only use the default export.
+          message: "Only use the default export in 'algosdk'. See rule comment for details",
+          selector: 'ImportDeclaration[source.value="algosdk"] ImportSpecifier',
+        },
+      ],
+    },
+  },
+  prettier,
+)