fix(deps): update dependency which to v2

Author: renovate-bot

package.json

@@ -39,7 +39,7 @@
     "slide": "^1.1.6",
     "uid-number": "0.0.6",
     "umask": "^1.1.0",
-    "which": "^1.3.1"
+    "which": "^2.0.0"
   },
   "devDependencies": {
     "npm-lifecycle": "2.1.1",