Update dependency lint-staged to v15

Author: renovate[bot]

package.json

@@ -23,7 +23,7 @@
     "babel-plugin-transform-flow-strip-types": "6.22.0",
     "flow-bin": "0.84.0",
     "graphql-request": "1.8.2",
-    "lint-staged": "12.5.0",
+    "lint-staged": "15.5.0",
     "prettier": "2.6.2"
   },
   "homepage": "https://github.com/nteract/nteract.io#readme",