fix(deps): update dependency postcss to ^8.4.19 (#45)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -78,7 +78,7 @@
     "outdent": "^0.8.0",
     "p-any": "^3.0.0",
     "p-props": "^4.0.0",
-    "postcss": "^8.4.18",
+    "postcss": "^8.4.19",
     "rimraf": "^3.0.2",
     "semver": "^7.3.8",
     "spdx-license-ids": "^3.0.12",