Upgrade several dependencies
This MR makes upgrades to several of our depended-upon crate version, and updates our code to match:
-
async_executors
⇒ 0.7.0 -
fast-socks5
⇒ 0.9.1 -
memmap2
⇒ 0.8.0 -
event_listener
⇒ 3.0.0 -
generic-array
⇒ Ø (we no longer use this crate directly; see commit message)