fix: Nix evaluation by upgrading dfinity
Due to a Hydra and Nix upgrade the `builtins.fetchGit` Nix function does not accept the `name` argument anymore.
`dfinity` revisions older than [c4bf03c](https://github.com/dfinity-lab/dfinity/commit/c4bf03c11e89dbe773822d6e128203588808d652) use `builtins.fetchGit` with a `name` argument so we need to upgrade
our dependency on it to at least that revision.
"type": "git"
},
"dfinity": {
- "ref": "release-2020-08-04.RC00",
+ "ref": "master",
"repo": "ssh://git@github.com/dfinity-lab/dfinity",
- "rev": "72eafca6f1b27f323ed9d16e8284152a2335bc98",
+ "rev": "c4bf03c11e89dbe773822d6e128203588808d652",
"type": "git"
},
"ic-ref": {
