chore(deps-dev): bump @types/jest from 26.0.20 to 26.0.21 (#282)

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.20 to 26.0.21.
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yarn.lock

@@ -688,9 +688,9 @@
     "@types/istanbul-lib-report" "*"
 
 "@types/jest@^26.0.7":
-  version "26.0.20"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.20.tgz#cd2f2702ecf69e86b586e1f5223a60e454056307"
-  integrity sha512-9zi2Y+5USJRxd0FsahERhBwlcvFh6D2GLQnY2FH2BzK8J9s9omvNHIbvABwIluXa0fD8XVKMLTO0aOEuUfACAA==
+  version "26.0.21"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.21.tgz#3a73c2731e7e4f0fbaea56ce7ff8c79cf812bd24"
+  integrity sha512-ab9TyM/69yg7eew9eOwKMUmvIZAKEGZYlq/dhe5/0IMUd/QLJv5ldRMdddSn+u22N13FP3s5jYyktxuBwY0kDA==
   dependencies:
     jest-diff "^26.0.0"
     pretty-format "^26.0.0"