fix: client/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727

client/package.json

@@ -60,7 +60,7 @@
     "@redux-saga/core": "^1.2.2",
     "@stripe/react-stripe-js": "1.16.5",
     "@stripe/stripe-js": "1.54.2",
-    "@testing-library/jest-dom": "5.17.0",
+    "@testing-library/jest-dom": "6.0.0",
     "algoliasearch": "4.20.0",
     "assert": "2.0.0",
     "babel-loader": "8.3.0",
@@ -75,8 +75,8 @@
     "date-fns": "2.30.0",
     "enzyme": "3.11.0",
     "final-form": "4.20.10",
-    "gatsby": "3.15.0",
-    "gatsby-cli": "3.15.0",
+    "gatsby": "4.22.0",
+    "gatsby-cli": "4.5.0",
     "gatsby-link": "3.15.0",
     "gatsby-plugin-advanced-sitemap": "2.1.0",
     "gatsby-plugin-create-client-paths": "3.15.0",
@@ -143,7 +143,7 @@
     "@babel/plugin-syntax-dynamic-import": "7.8.3",
     "@codesee/babel-plugin-instrument": "0.587.0",
     "@codesee/tracker": "0.587.0",
-    "@testing-library/jest-dom": "5.17.0",
+    "@testing-library/jest-dom": "6.0.0",
     "@testing-library/react": "12.1.5",
     "@total-typescript/ts-reset": "^0.5.0",
     "@types/canvas-confetti": "^1.6.0",