Bump safe-eth-py[django] from 6.0.0b16 to 6.0.0b18

Bumps [safe-eth-py[django]](https://github.com/safe-global/safe-eth-py) from 6.0.0b16 to 6.0.0b18.
- [Release notes](https://github.com/safe-global/safe-eth-py/releases)
- [Commits](safe-global/safe-eth-py@v6.0.0b16...6.0.0b18)

---
updated-dependencies:
- dependency-name: safe-eth-py[django]
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -13,5 +13,5 @@ gunicorn[gevent]==21.2.0
 hexbytes==0.3.1
 packaging>=21
 requests==2.31.0
-safe-eth-py[django]==6.0.0b16
+safe-eth-py[django]==6.0.0b18
 web3==6.15.1