release: Bump versions.

(This is on top of !3305 (merged), to avoid conflicts. Really wish Gitlab had a nicer way to deal with stacked changes!)

---

Because we've updated our MSRV, we must bump the minor version for every package.

This was done as follows:

cargo set-version -p arti 1.6.0

cargo set-version -p oneshot-fused-workaround 0.4.0
cargo set-version -p slotmap-careful 0.4.0
cargo set-version -p test-temp-dir 0.5.0
cargo set-version -p fslock-guard 0.4.0
cargo set-version -p hashx 0.5.0
cargo set-version -p equix 0.4.0
cargo set-version -p caret 0.7.0
cargo set-version -p fs-mistrust 0.12.0
cargo set-version -p safelog 0.6.0
cargo set-version -p retry-error 0.8.0

xargs -I P <<END cargo set-version -p P 0.35.0
tor-basic-utils
tor-error
tor-general-addr
tor-geoip
tor-rtcompat
tor-rtmock
tor-async-utils
tor-config
tor-config-path
tor-rpc-connect
tor-log-ratelim
tor-rpcbase
tor-memquota
tor-units
tor-llcrypto
tor-bytes
tor-protover
tor-checkable
tor-cert
tor-key-forge
tor-hscrypto
tor-socksproto
tor-linkspec
tor-cell
tor-proto
tor-netdoc
tor-consdiff
tor-netdir
tor-relay-selection
tor-persist
tor-keymgr
tor-chanmgr
tor-ptmgr
tor-dircommon
tor-guardmgr
tor-circmgr
tor-dirclient
tor-dirmgr
tor-dirserver
tor-hsclient
tor-hsservice
tor-hsrproxy
tor-relay-crypto
arti-client
arti-relay
arti-rpcserver
arti-ureq
arti-rpc-client-core
END