feat: support cjs and esm both by tshy (#67)

BREAKING CHANGE: drop Node.js < 18.19.0 support

part of eggjs/egg#3644

eggjs/egg#5257

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
  - Introduced a new middleware for handling multipart requests.
  - Added improved error handling for oversized file uploads.

- **Refactor**
- Streamlined configuration and context enhancements for better
stability and TypeScript support.
- Modernized the codebase by transitioning to ES modules and updating
type definitions.

- **Chores**
- Updated package metadata, dependencies, and continuous integration
settings to support newer Node.js versions.
- Introduced a new TypeScript configuration for stricter type-checking.

- **Tests**
- Added unit tests to validate application behavior under incorrect
configurations.
- Established comprehensive tests for multipart form handling to ensure
correct processing of file uploads.
- Transitioned existing tests to TypeScript and updated assertions for
consistency.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.eslintignore

@@ -1,3 +1,3 @@
 test/fixtures
-node_modules
 coverage
+__snapshots__

.eslintrc

@@ -1,3 +1,6 @@
 {
-  "extends": "eslint-config-egg"
+  "extends": [
+    "eslint-config-egg/typescript",
+    "eslint-config-egg/lib/rules/enforce-node-prefix"
+  ]
 }

.github/workflows/nodejs.yml

@@ -12,6 +12,6 @@ jobs:
     uses: node-modules/github-actions/.github/workflows/node-test.yml@master
     with:
       os: 'ubuntu-latest, macos-latest, windows-latest'
-      version: '16, 18, 20, 22'
+      version: '18, 20, 22'
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -10,3 +10,6 @@ test/fixtures/**/run
 *-lock.yaml
 test/fixtures/apps/ts/tsconfig.tsbuildinfo
 test/fixtures/apps/ts/**/*.d.ts
+.tshy*
+.eslintcache
+dist