Add linting and update dependencies

.gitignore

@@ -7,3 +7,4 @@
 !/tsconfig-*.json
 !/.prettierignore
 /benchmark-*.json
+!eslint.config.mjs

eslint.config.mjs

@@ -0,0 +1,55 @@
+import eslint from '@eslint/js'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: [
+      '.tap/',
+      'tap-snapshots/',
+      'dist/',
+      'benchmark/',
+      'eslint.config.mjs',
+      'map.js',
+    ],
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    files: ['**/test/**/*.ts'],
+    rules: {
+      'no-empty': 'off',
+      '@typescript-eslint/require-await': 'off',
+      '@typescript-eslint/no-unnecessary-type-assertion': 'off',
+      '@typescript-eslint/ban-ts-comment': [
+        'error',
+        {
+          minimumDescriptionLength: 0,
+        },
+      ],
+      '@typescript-eslint/no-floating-promises': [
+        'error',
+        {
+          allowForKnownSafeCalls: [
+            'test',
+            'rejects',
+            'resolveMatch',
+            'resolves',
+          ].map(name => ({
+            name,
+            from: 'package',
+            package: 'tap',
+          })),
+        },
+      ],
+    },
+  },
+)