Update dependency configstore to v6

Author: renovate-bot

package-lock.json

@@ -31,7 +31,7 @@
     "cli-table3": "^0.6.0",
     "colors": "^1.4.0",
     "commander": "^5.1.0",
-    "configstore": "^5.0.1",
+    "configstore": "^6.0.0",
     "debug": "^4.1.1",
     "es-aggregate-error": "^1.0.3",
     "finalhandler": "^1.1.2",