Bump simple-git from 3.5.0 to 3.15.0

Bumps [simple-git](https://github.com/steveukx/git-js/tree/HEAD/simple-git) from 3.5.0 to 3.15.0.
- [Release notes](https://github.com/steveukx/git-js/releases)
- [Changelog](https://github.com/steveukx/git-js/blob/main/simple-git/CHANGELOG.md)
- [Commits](https://github.com/steveukx/git-js/commits/simple-git@3.15.0/simple-git)

---
updated-dependencies:
- dependency-name: simple-git
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -128,7 +128,7 @@
     "rollup-plugin-terser": "^5.3.0",
     "rollup-plugin-version-injector": "^1.3.3",
     "semver": "^7.3.5",
-    "simple-git": "^3.5.0",
+    "simple-git": "^3.15.0",
     "sinon": "^9.0.1",
     "sinon-browser-only": "^1.12.1",
     "system-commands": "^1.1.7",