v0.4.0

Changelog

• be24fcc Add new exchange-intf and gen-keys-intf sub-commands
• 6a65a1f Add support for single port mode
• a55bf1b Add target to Makefile for building binary
• eaebd6b Added RawUDPConn
• 0e491b7 Fix single port conn for unsupported OSes
• a9cd41b Handle unsupported OSes for single port mode
• dbc79f4 Run CI tests with root permissions
• 0730f15 Skip tests which require root permissions
• a586178 Use crypto/rand
• 8750dad Use wg-quick configuration files rather netlink interface to get interface configuration