Bump simple-git from 1.107.0 to 3.15.0

Bumps [simple-git](https://github.com/steveukx/git-js/tree/HEAD/simple-git) from 1.107.0 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

@@ -44,7 +44,7 @@
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "replace-in-file": "^3.4.3",
-    "simple-git": "^1.107.0",
+    "simple-git": "^3.15.0",
     "symlink-dir": "^3.1.0",
     "webpack": "^4.35.0",
     "webpack-cli": "^3.3.5"