ltree, lquery, and ltxtquery.hmac, md-5 and sha.hmac.password module, which can be used to hash passwords before using them in queries like ALTER USER.LSN.md5 to md-5.bytes, hmac, and rand.escape::{escape_literal, escape_identifier}.base64 and hmac.hmac and sha2.base64 to 0.12.frontend::Message is now a true non-exhaustive enum.bytes to 0.5.BytesMut rather than Vec<u8>.backend::Framed to minimally parse the structure of backend messages.types::array_to_sql now automatically computes the required flags and no longer takes a has_nulls parameter.Look at the release tags for information about older releases.