chore: bump contract dependencies

Description

Strangely, the changes made in https://github.com/aragon/osx/pull/576 got lost/reverted - potentially through a merge conflict resolution.

[x] I have selected the correct base branch.
[x] I have performed a self-review of my own code.
[x] I have commented my code, particularly in hard-to-understand areas.
[x] My changes generate no new warnings.
[x] Any dependent changes have been merged and published in downstream modules.
[x] I ran all tests with success and extended them if necessary.
[x] I have updated the CHANGELOG.md file in the root folder.
[ ] I have updated the DEPLOYMENT_CHECKLIST file in the root folder.
[ ] I have updated the UPDATE_CHECKLIST file in the root folder.
[ ] I have updated the Subgraph and added a QA URL to the description of this PR.