chore: use semver compatible version (#5678)

## About the changes
Replicate the change made to respect semver

package.json

@@ -1,7 +1,7 @@
 {
   "name": "unleash-server",
   "description": "Unleash is an enterprise ready feature toggles service. It provides different strategies for handling feature toggles.",
-  "version": "5.7.0-main",
+  "version": "5.7.0+main",
   "keywords": ["unleash", "feature toggle", "feature", "toggle"],
   "files": [
     "dist",

src/test/e2e/api/openapi/openapi.e2e.test.ts

@@ -47,7 +47,10 @@ test('should serve the OpenAPI spec with a `version` property', async () => {
         .expect((res) => {
             const { version } = res.body.info;
             // ensure there's no whitespace or leading `v`
-            expect(semver.clean(version)).toStrictEqual(version);
+            // clean removes +anything modifier from the version
+            expect(version).toMatch(
+                new RegExp(`^${semver.clean(version) ?? 'invalid semver'}`),
+            );
 
             // ensure the version listed is valid semver
             expect(semver.parse(version, { loose: false })).toBeTruthy();