fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ASYNC-7414156

Author: snyk-bot

package.json

@@ -157,7 +157,7 @@
     "babel-plugin-macros": "^3.1.0",
     "browser-sync": "^2.27.11",
     "chalk": "4.1.2",
-    "chromatic": "^6.17.0",
+    "chromatic": "^6.19.4",
     "color": "^3.1.2",
     "commander": "^2.20.0",
     "concurrently": "^7.6.0",