chore(package): update @semantic-release/git to version 7.0.2

Closes #209

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
   "devDependencies": {
     "@semantic-release/changelog": "2.0.1",
     "@semantic-release/exec": "2.2.3",
-    "@semantic-release/git": "4.0.3",
+    "@semantic-release/git": "7.0.2",
     "async-describe": "1.2.0",
     "babel-cli": "6.26.0",
     "babel-core": "6.26.0",