This PR fixes a ReferenceError: __dirname is not defined that occurs when running the plugin in Node.js environments that use ESM modules.

Problem

The plugin was using the CommonJS __dirname variable in the runNcu method:

path.resolve(__dirname, '../node_modules/npm-check-updates/build/src/bin/cli.js')

However, since the project is configured as an ESM module ("type": "module" in package.json), __dirname is not available and causes a runtime error:

[13/02/2025, 17:01:20] [Plugin Update] ReferenceError: __dirname is not defined
    at PluginUpdatePlatform.runNcu (file:///var/lib/homebridge/node_modules/@homebridge-plugins/homebridge-plugin-update-check/src/index.ts:71:20)

Solution

Replaced the CommonJS __dirname with the ESM equivalent:

// Before
path.resolve(__dirname, '../node_modules/npm-check-updates/build/src/bin/cli.js')

// After  
path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../node_modules/npm-check-updates/build/src/bin/cli.js')

This change:

• Adds the necessary import { fileURLToPath } from 'node:url' import
• Uses fileURLToPath(import.meta.url) to get the current module's file path
• Uses path.dirname() to extract the directory path

The fix maintains the same functionality while being compatible with ESM modules.

Testing

• ✅ TypeScript compilation succeeds
• ✅ ESLint passes without issues
• ✅ Unit tests pass
• ✅ No remaining __dirname references in the codebase

Fixes #85.

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