fix: upgrade mkdirp from 0.5.2 to 0.5.5 (#68)

Snyk has created this PR to upgrade mkdirp from 0.5.2 to 0.5.5.

See this package in NPM:
https://www.npmjs.com/package/mkdirp

See this project in Snyk:
https://app.snyk.io/org/andreasonny83/project/6cf5f56d-5a57-430f-8895-b4b594f4f466?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -16,7 +16,7 @@
     "chrome-launcher": "^0.13.2",
     "lighthouse": "^6.0.0",
     "meow": "^6.1.0",
-    "mkdirp": "^0.5.2",
+    "mkdirp": "^0.5.5",
     "ora": "^3.4.0",
     "rimraf": "^2.6.3",
     "update-notifier": "^4.0.0",