chore(deps): bump simple-git from 2.19.0 to 2.21.0 (#80)

Bumps [simple-git](https://github.com/steveukx/git-js) from 2.19.0 to 2.21.0.
- [Release notes](https://github.com/steveukx/git-js/releases)
- [Changelog](https://github.com/steveukx/git-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/steveukx/git-js/compare/v2.19.0...v2.21.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -1518,9 +1518,9 @@
       "dev": true
     },
     "simple-git": {
-      "version": "2.19.0",
-      "resolved": "https://registry.npmjs.org/simple-git/-/simple-git-2.19.0.tgz",
-      "integrity": "sha512-OZKxX9zHeH8JbCo8DMlERE8RsWox7Q9Jmh+lJKw/Zla8HQkiVP5I4LF5ZRfkud9XU27ZNgpccHezg1lbHw6VzQ==",
+      "version": "2.21.0",
+      "resolved": "https://registry.npmjs.org/simple-git/-/simple-git-2.21.0.tgz",
+      "integrity": "sha512-rohCHmEjD/ESXFLxF4bVeqgdb4Awc65ZyyuCKl3f7BvgMbZOBa/Ye3HN/GFnvruiUOAWWNupxhz3Rz5/3vJLTg==",
       "requires": {
         "@kwsites/file-exists": "^1.1.1",
         "@kwsites/promise-deferred": "^1.1.1",

package.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "@actions/core": "^1.2.6",
     "axios": "^0.21.0",
-    "simple-git": "^2.19.0"
+    "simple-git": "^2.21.0"
   },
   "devDependencies": {
     "@types/node": "^12.12.54",