Bump bn.js from 5.2.2 to 5.2.3 in /contract-tests

Bumps [bn.js](https://github.com/indutny/bn.js) from 5.2.2 to 5.2.3.
- [Release notes](https://github.com/indutny/bn.js/releases)
- [Changelog](https://github.com/indutny/bn.js/blob/master/CHANGELOG.md)
- [Commits](indutny/bn.js@v5.2.2...v5.2.3)

---
updated-dependencies:
- dependency-name: bn.js
  dependency-version: 5.2.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

contract-tests/yarn.lock

@@ -1342,9 +1342,9 @@ balanced-match@^1.0.0:
   integrity sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==
 
 bn.js@^5.2.1:
-  version "5.2.2"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.2.tgz#82c09f9ebbb17107cd72cb7fd39bd1f9d0aaa566"
-  integrity sha512-v2YAxEmKaBLahNwE1mjp4WON6huMNeuDvagFZW+ASCuA/ku0bXR9hSMw0XpiqMoA3+rmnyck/tPRSFQkoC9Cuw==
+  version "5.2.3"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.3.tgz#16a9e409616b23fef3ccbedb8d42f13bff80295e"
+  integrity sha512-EAcmnPkxpntVL+DS7bO1zhcZNvCkxqtkd0ZY53h06GNQ3DEkkGZ/gKgmDv6DdZQGj9BgfSPKtJJ7Dp1GPP8f7w==
 
 brace-expansion@^2.0.1:
   version "2.0.2"