Migrating from Gun 2.4 to 2.5

Gun 2.5 fixes a number of security vulnerabilities. It also has a few new options.

Gun 2.5 updates Cowlib to 2.19.0. Both applications must be updated as they both contain security fixes.

Gun 2.5 requires Erlang/OTP 24.0 or greater.

Features added

• A compat Websocket compression mode has been added. In this mode, Gun uses default compression and does not send parameters to accomodate servers that do not support them.
• The HTTP/2 option max_headers is now documented.
• Update Cowlib to 2.19.0.

Bugs fixed

• The HTTP/1.1 connection could get into a state where it would no longer read from the socket. This has been addressed.