chore:(deps): bump @testing-library/user-event in /explorer (#16950)

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 13.1.6 to 13.1.8.
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/master/CHANGELOG.md)
- [Commits](https://github.com/testing-library/user-event/compare/v13.1.6...v13.1.8)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

explorer/package-lock.json

@@ -2981,9 +2981,9 @@
       }
     },
     "@testing-library/user-event": {
-      "version": "13.1.6",
-      "resolved": "https://registry.npmjs.org/@testing-library/user-event/-/user-event-13.1.6.tgz",
-      "integrity": "sha512-mykGPKQn0QO5faqJ47I6Wp3yererB3nNH9OEELVLyDZ4b6QTnix1OFbR0/th1bEYHaWiiymm2hJ5czOyWP2WUg==",
+      "version": "13.1.8",
+      "resolved": "https://registry.npmjs.org/@testing-library/user-event/-/user-event-13.1.8.tgz",
+      "integrity": "sha512-M04HgOlJvxILf5xyrkJaEQfFOtcvhy3usLldQIEg9zgFIYQofSmFGVfFlS7BWowqlBGLrItwGMlPXCoBgoHSiw==",
       "requires": {
         "@babel/runtime": "^7.12.5"
       },

explorer/package.json

@@ -11,7 +11,7 @@
     "@solana/web3.js": "^1.7.0",
     "@testing-library/jest-dom": "^5.12.0",
     "@testing-library/react": "^11.2.6",
-    "@testing-library/user-event": "^13.1.6",
+    "@testing-library/user-event": "^13.1.8",
     "@types/bn.js": "^5.1.0",
     "@types/bs58": "^4.0.1",
     "@types/chai": "^4.2.16",