chore(package): update gulp-git to version 2.5.1

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "gulp-babel": "7.0.0",
     "gulp-bump": "3.0.0",
     "gulp-eslint": "4.0.1",
-    "gulp-git": "2.5.0",
+    "gulp-git": "2.5.1",
     "gulp-jasmine": "3.0.0",
     "jasmine-core": "2.8.0",
     "run-sequence": "2.2.1",