Bump @types/jest from 26.0.19 to 26.0.20 in /client

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.19 to 26.0.20.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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

Author: dependabot[bot]

client/package.json

@@ -56,7 +56,7 @@
     "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^11.2.3",
     "@testing-library/user-event": "^12.1.3",
-    "@types/jest": "^26.0.10",
+    "@types/jest": "^26.0.20",
     "@types/lodash": "^4.14.167",
     "@types/luxon": "^1.24.3",
     "@types/nock": "^11.1.0",

client/yarn.lock

@@ -1799,10 +1799,10 @@
   dependencies:
     "@types/istanbul-lib-report" "*"
 
-"@types/jest@*", "@types/jest@^26.0.10":
-  version "26.0.19"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.19.tgz#e6fa1e3def5842ec85045bd5210e9bb8289de790"
-  integrity sha512-jqHoirTG61fee6v6rwbnEuKhpSKih0tuhqeFbCmMmErhtu3BYlOZaXWjffgOstMM4S/3iQD31lI5bGLTrs97yQ==
+"@types/jest@*", "@types/jest@^26.0.20":
+  version "26.0.20"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.20.tgz#cd2f2702ecf69e86b586e1f5223a60e454056307"
+  integrity sha512-9zi2Y+5USJRxd0FsahERhBwlcvFh6D2GLQnY2FH2BzK8J9s9omvNHIbvABwIluXa0fD8XVKMLTO0aOEuUfACAA==
   dependencies:
     jest-diff "^26.0.0"
     pretty-format "^26.0.0"