Bump @gnosis.pm/dex-contracts from 0.2.1 to 0.2.7

Bumps [@gnosis.pm/dex-contracts](https://github.com/gnosis/dex-contracts) from 0.2.1 to 0.2.7.
- [Release notes](https://github.com/gnosis/dex-contracts/releases)
- [Commits](gnosis/dex-contracts@v0.2.1...v0.2.7)

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

yarn.lock

@@ -280,9 +280,9 @@
     minimist "^1.2.0"
 
 "@gnosis.pm/dex-contracts@^0.2.0":
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/@gnosis.pm/dex-contracts/-/dex-contracts-0.2.1.tgz#c36c8538568168526fc951e7ba78f7754610b519"
-  integrity sha512-6s4dJbgdX57cSgbXIUL1vnAN/B8gNqmZwb4w0LgDtunVMPj1AdhuIi1umdLqmFvsyPhYngDhhqbLJmdbn7YGrg==
+  version "0.2.7"
+  resolved "https://registry.yarnpkg.com/@gnosis.pm/dex-contracts/-/dex-contracts-0.2.7.tgz#13fccf13c9243e8ddcfa0fb910dc563aaa482954"
+  integrity sha512-4pGEWhVYthHDKFWFbqgEXGED+C7ZaQvwHdNwVT6qoxC2o+PtSTCValVpH2SrpXEWn95sB1tQNodPhN7T1Tdxuw==
   dependencies:
     bn.js "^5.1.1"