Update deps

[rukai]

metrics::clear_recorder(); was removed from metrics (technically just marked unsafe and hidden from docs) due to being dangerous to use.
So I changed our metrics init code to instead ignore errors due to metrics already being initialized.

[rukai]

@conorbros would be good to rereview this considering there was a drastic change since your previous approval.

[github-actions]

1 benchmark regressed. 0 benchmark improved. Please check the benchmark workflow logs for full details: https://github.com/shotover/shotover-proxy/actions/runs/2471802550

�[2m2022-06-10T00:23:00.243025Z�[0m �[31mERROR�[0m �[2mshotover_proxy::server�[0m�[2m:�[0m source CassandraSource encountered an error when flushing the chain for shutdown: Connection refused (os error 111)
cassandra/tls_insert    time:   [1.0291 ms 1.0593 ms 1.0929 ms]
                        thrpt:  [915.02  elem/s 944.00  elem/s 971.74  elem/s]
                 change:
                        time:   [+25.046% +33.845% +42.780%] (p = 0.00 < 0.05)
                        thrpt:  [-29.962% -25.287% -20.030%]
                        Performance has regressed.