Pin underscore to version 1.13.7

Author: depfu[bot]

package.json

@@ -44,7 +44,7 @@
   "dependencies": {
     "messy": "^6.16.0",
     "passerror": "^1.1.0",
-    "underscore": "^1.7.0",
+    "underscore": "1.13.7",
     "unexpected-messy": "^11.1.0"
   },
   "peerDependencies": {