Bump socket2 from 0.3.9 to 0.3.19 in /workshop_serveless/ex3

[dependabot]

Bumps socket2 from 0.3.9 to 0.3.19.

Changelog

Sourced from socket2's changelog.

0.4.5

Changed

• Replace winapi dependency with windows-sys (rust-lang/socket2#303).

Added

• Socket::join_ssm_v4 and Socket::leave_ssm_v4 (rust-lang/socket2#298).
• Socket::set_recv_tos and Socket::recv_tos (rust-lang/socket2#299).

Fixed

• Fix OpenBSD build (rust-lang/socket2#291).
• Fix OpenBSD build (rust-lang/socket2#291).

0.4.4

Fixed

• Libc v0.2.114 fixed an issue where ip_mreqn where was not defined for Linux s390x.

0.4.3 (yanked)

Added

• Socket::set_fib: sets SO_SETFIB (rust-lang/socket2#271).
• Socket::attach_filter, SO_ATTACH_FILTER (rust-lang/socket2@6601ed1).
• Socket::detach_filter, SO_DETACH_FILTER (rust-lang/socket2@6601ed1).
• Socket::{header_included, set_header_included}: sets or gets IP_HDRINCL (rust-lang/socket2@f9e882e).
• Socket::{cork, set_cork}: sets or gets TCP_CORK (rust-lang/socket2@50f31f1).
• Socket::{quickack, set_quickack}: sets or gets TCP_QUICKACK (rust-lang/socket2@849eee2).
• Socket::{thin_linear_timeouts, set_thin_linear_timeouts}: sets or gets TCP_THIN_LINEAR_TIMEOUTS (rust-lang/socket2@24c231c).
• Socket::{join_multicast_v4_n, leave_multicast_v4_n}: extends the existing multicast API by allowing an index to be used (in addition to an address) (rust-lang/socket2@750f836).

0.4.2

... (truncated)

Commits

• c991f80 Release v0.3.19
• 1dfd15d Add Socket::(bind_)device
• beeebd0 Release v0.3.18
• a0053b5 Backport redox compilation to 0.3
• 3b4214d Fix compilation on Haiku
• 7312f81 Release v0.3.17
• 930c9a9 Additional Linux socket options
• 06a2510 [0.3] Update cfg-if to 1.0
• 73d54bb Release v0.3.16
• d2c15de Don't assume memory layout of std::net::SocketAddr
• Additional commits viewable in compare view

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