fix: php version with warnings is not correct

.eslintrc.cjs

@@ -1,5 +1,3 @@
-const os = require('os');
-
 module.exports = {
   root: true,
   parser: '@typescript-eslint/parser',
@@ -23,7 +21,12 @@ module.exports = {
     'no-sync': 'error',
     'prefer-promise-reject-errors': 'off',
     'n/prefer-promises/fs': 'error',
-    'prettier/prettier': os.platform() === 'win32' ? 'off' : 'error',
+    'prettier/prettier': [
+      'error',
+      {
+        endOfLine: 'auto'
+      }
+    ],
     '@typescript-eslint/no-floating-promises': [
       'error',
       {

src/PHPFmt.ts

@@ -198,11 +198,11 @@ export class PHPFmt {
     }
 
     try {
-      const { stdout, stderr } = await exec(
+      const { stdout, stderr, code } = await exec(
         `${this.config.php_bin} -v`,
         execOptions
       );
-      if (stderr) {
+      if (code !== 0) {
         this.widget.logError('getting php version failed', stderr);
         throw new PHPFmtError(`"php -v" returns non-zero code`);
       }

src/utils.ts

@@ -5,7 +5,11 @@ import https from 'https';
 export const exec = async (
   command: string,
   options?: (ObjectEncodingOptions & ExecOptions) | undefined | null
-): Promise<{ stdout: string; stderr: string }> => {
+): Promise<{
+  stdout: string;
+  stderr: string;
+  code: number | null;
+}> => {
   return await new Promise((resolve, reject) => {
     const child = childProcess.exec(
       command,
@@ -16,7 +20,8 @@ export const exec = async (
         } else {
           resolve({
             stdout: String(stdout),
-            stderr: String(stderr)
+            stderr: String(stderr),
+            code: child.exitCode
           });
         }
       }