refactor: remove node-fetch and fs-extra dependencies (#161)

Replace node-fetch with native fetch API and remove unused fs-extra dependency.
The native fetch API is now available in Node.js 18+ and provides the same functionality.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <[email protected]>

Author: azu

package.json

@@ -40,10 +40,8 @@
     "trailingComma": "none"
   },
   "dependencies": {
-    "fs-extra": "^8.1.0",
     "get-url-origin": "^1.0.1",
     "minimatch": "^3.0.4",
-    "node-fetch": "^2.6.0",
     "p-memoize": "^3.1.0",
     "p-queue": "^6.2.0",
     "textlint-rule-helper": "^2.2.4"
@@ -54,7 +52,6 @@
     "@types/minimatch": "^5.1.2",
     "@types/mocha": "^10.0.0",
     "@types/node": "^24.3.0",
-    "@types/node-fetch": "^2.6.2",
     "lint-staged": "^16.1.5",
     "mocha": "^11.7.1",
     "prettier": "^3.6.2",

pnpm-lock.yaml

@@ -1,5 +1,4 @@
 import { RuleHelper } from "textlint-rule-helper";
-import fetch, { RequestInit } from "node-fetch";
 import URL from "url";
 import fs from "fs/promises";
 import minimatch from "minimatch";
@@ -109,10 +108,6 @@ const createFetchWithRuleDefaults = (ruleOptions: Options) => {
         const { host } = URL.parse(uri);
         return fetch(uri, {
             ...fetchOptions,
-            // Disable gzip compression in Node.js
-            // to avoid the zlib's "unexpected end of file" error
-            // https://github.com/request/request/issues/2045
-            compress: false,
             // Some website require UserAgent and Accept header
             // to avoid ECONNRESET error
             // https://github.com/textlint-rule/textlint-rule-no-dead-link/issues/111
@@ -168,11 +163,11 @@ const createCheckAliveURL = (ruleOptions: Options) => {
         maxRetryCount: number = 3,
         currentRetryCount: number = 0
     ): Promise<AliveFunctionReturn> {
-        const opts: RequestInit = {
+        const opts = {
             method,
             // Use `manual` redirect behaviour to get HTTP redirect status code
             // and see what kind of redirect is occurring
-            redirect: "manual"
+            redirect: "manual" as RequestRedirect
         };
         try {
             const res = await fetchWithDefaults(uri, opts);