Update dependencies

- Fix eslint warnings

.github/workflows/lint.yml

@@ -15,4 +15,6 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Run eslint
-      run: npx eslint index.js
+      run: |
+        npm install
+        npx eslint index.js

eslint.config.mjs

@@ -0,0 +1,42 @@
+import globals from 'globals';
+import js from '@eslint/js';
+import stylisticJs from '@stylistic/eslint-plugin-js';
+
+const commonRules = {
+  '@stylistic/js/max-len': ['error', { 'code': 80 }],
+  'prefer-const': 'warn',
+  'line-comment-position': ['warn', { 'position': 'above' }],
+  'camelcase': 'warn',
+  'no-const-assign': 'warn',
+  'no-this-before-super': 'warn',
+  'no-undef': 'warn',
+  'no-unreachable': 'warn',
+  'no-unused-vars': 'warn',
+  'constructor-super': 'warn',
+  'valid-typeof': 'warn',
+};
+
+export default [
+  js.configs.recommended,
+  {
+    files: ['*.js'],
+    plugins: {
+      '@stylistic/js': stylisticJs
+    },
+    languageOptions: {
+      sourceType: 'commonjs',
+      globals: {
+        ...globals.node,
+        ...globals.es2021,
+      }
+    },
+    rules: commonRules,
+  },
+  {
+    ignores: [
+      '.*/**/*',
+      'dist/**/*',
+      'node_modules/**/*',
+      '*.config.mjs']
+  }
+];

index.js

@@ -1,4 +1,4 @@
-const child_process = require('child_process');
+const childProcess = require('child_process');
 const core = require('@actions/core');
 const fs = require('fs');
 const os = require('os');
@@ -44,7 +44,7 @@ try {
     const knownHostsFile = path.join(homeDotSshDir, 'known_hosts');
     fs.writeFileSync(knownHostsFile, GITHUB_COM + os.EOL);
     console.log(`${knownHostsFile}: created`);
-    let sshConfigList = [];
+    const sshConfigList = [];
     for (let k = 0; k < n; ++k) {
         const keyLines = allKeys[k].trim()
              .split(/\r?\n/);
@@ -72,7 +72,7 @@ try {
             return;
         }
 
-        child_process.execSync(
+        childProcess.execSync(
             `ssh-keygen -y -f ${keyFile} > ${publicKeyFile}`);
         console.log(`${publicKeyFile}: created`);
         const data = fs.readFileSync(publicKeyFile, { encoding: 'utf8' });
@@ -94,7 +94,7 @@ try {
         const url = comment.slice(0, -COMMENT_POSTFIX.length);
         const pathOfUrl = url.slice(COMMENT_PREFIX.length);
         const newUrl = `git@${fakeHost}:${pathOfUrl}`;
-        child_process.execSync(
+        childProcess.execSync(
             `git config --global url.${newUrl}.insteadOf ${url}`);
         sshConfigList.push(`Host ${fakeHost}`,
             '  HostName github.com',