fix: move git-toplevel to dependencies

Author: marionebl

package.json

@@ -97,7 +97,6 @@
     "conventional-recommended-bump": "0.3.0",
     "cz-conventional-changelog-lint": "0.1.3",
     "execa": "0.6.0",
-    "git-toplevel": "1.1.1",
     "mz": "2.6.0",
     "path-exists": "3.0.0",
     "rimraf": "2.6.1",
@@ -119,6 +118,7 @@
     "franc": "2.0.0",
     "get-stdin": "5.0.1",
     "git-raw-commits": "1.1.2",
+    "git-toplevel": "1.1.1",
     "lodash": "4.17.4",
     "meow": "3.7.0",
     "pos": "0.4.2",