refactor(customUpdater): improve regex for version

- Updated regex to handle optional parts
- Improved robustness of version parsing

Author: taj54

dist/index.js

@@ -6,7 +6,7 @@
  * Author: Taj <[email protected]>
  * Homepage: https://github.com/taj54/universal-version-bump#readme
  * License: MIT
- * Generated on Mon, 01 Sep 2025 13:24:50 GMT
+ * Generated on Mon, 01 Sep 2025 13:30:16 GMT
  */
 require('./sourcemap-register.js');/******/ (() => { // webpackBootstrap
 /******/ 	var __webpack_modules__ = ({
@@ -33427,7 +33427,7 @@ class CustomUpdater {
         }
         const newVersion = (0, utils_1.calculateNextVersion)(oldVersion, releaseType);
         // eslint-disable-next-line no-useless-escape
-        const regexReplace = new RegExp(`"${this.variableName}"\\s*:\\s*["']${oldVersion}["']`);
+        const regexReplace = new RegExp(`("${this.variableName}"\\s*:\\s*["'])(?:${oldVersion})(["'])`);
         this.manifestParser.updateVersion(this.filePath, newVersion, 'regex', {
             regexReplace,
         });

dist/index.js.map

@@ -52,8 +52,9 @@ export class CustomUpdater implements UpdaterInterface {
 
     const newVersion = calculateNextVersion(oldVersion, releaseType);
     // eslint-disable-next-line no-useless-escape
-    const regexReplace: RegExp = new RegExp(`"${this.variableName}"\\s*:\\s*["']${oldVersion}["']`);
-
+    const regexReplace: RegExp = new RegExp(
+      `("${this.variableName}"\\s*:\\s*["'])(?:${oldVersion})(["'])`,
+    );
     this.manifestParser.updateVersion(this.filePath, newVersion, 'regex', {
       regexReplace,
     });