Refactor to move tests to root

Author: wooorm

package.json

@@ -56,7 +56,7 @@
     "prepack": "npm run build && npm run format",
     "build": "tsc --build --clean && tsc --build && type-coverage",
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "test-api": "node --conditions development test/index.js",
+    "test-api": "node --conditions development test.js",
     "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
     "test": "npm run build && npm run format && npm run test-coverage"
   },

test/index.js test.jstest/index.js renamed to test.js

@@ -2,7 +2,7 @@ import assert from 'node:assert/strict'
 import test from 'node:test'
 import stringify from 'json-stringify-safe'
 import {parse, parseFragment} from 'parse5'
-import {toParse5} from '../index.js'
+import {toParse5} from './index.js'
 
 test('core', () => {
   assert.deepEqual(