chore(deps): Update partial_ref to v0.3.4

[adamgemmell]

What does this PR try to resolve?

Running the resolver tests hangs for quite a while when using a nightly with the new trait solver. This is because it experiences a huge compile time regression when trying to build varisat due to the use of unconstrained lifetimes in partial_ref.

This PR bumps partial_ref to include jix/partial_ref#6. See rust-lang/rust#161575 for more details.

How to test and review this PR?

CI should be sufficient testing for this PR.

[rustbot]

r? @weihanglo

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• Owners of files modified in this PR: @epage, @weihanglo
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[adamgemmell]

This CI failure is sporadic and happens on master too. It seems gitoxide is sometimes providing different output for ssh errors, for example:

thread 'ssh::bundled_github_works' (2306524) panicked at tests/testsuite/ssh.rs:528:10:

---- expected: tests/testsuite/ssh.rs:469:9
++++ actual:   stderr
   1    1 | [UPDATING] git repository `ssh://git@github.com/rust-lang/bitflags.git`
   2    2 | [ERROR] failed to get `bitflags` as a dependency of package `foo v0.1.0 ([ROOT]/foo)`
   3    3 |
   4    4 | Caused by:
   5    5 |   failed to load source for dependency `bitflags`
          ⋮
   9    9 |
  10   10 | Caused by:
  11   11 |   failed to clone into: [ROOT]/home/.cargo/git/db/bitflags-[HASH]
  12   12 |
  13   13 | Caused by:
  14      -   failed to authenticate when downloading repository
  15      -
  16      -   * attempted to find username/password via `credential.helper`, but maybe the found credentials were incorrect
  17      -
  18      -   if the git CLI succeeds then `net.git-fetch-with-cli` may help here
       14 +   network failure seems to have happened
       15 +   if a proxy or similar is necessary `net.git-fetch-with-cli` may help here
  19   16 |   https://doc.rust-lang.org/cargo/reference/config.html#netgit-fetch-with-cli
  20   17 |
  21   18 | Caused by:
  22      - [CREDENTIAL]s provided for "ssh://git@github.com/rust-lang/bitflags.git" were not accepted by the remote
       19 +   An IO error occurred when talking to the server
  23   20 |
  24   21 | Caused by:
  25      -   git@github.com: Permission denied (publickey).
       22 +   Connection closed by 20.26.156.215 port 22