feat: add msrv to CHANGELOG.md and manifest

Author: Ddystopia

CHANGELOG.md

@@ -8,6 +8,7 @@ This document describes the changes to Minimq between releases.
 * The `Publication::finish()` API was removed in favor of a new `Publication::respond()` API for
 constructing replies to previously received messages.
 * [breaking] `embedded-nal` bumped. Now `core::net::SocketAddr` and related ip types are used.
+  MSRV becomes 1.77.0.
 
 # [0.9.0] - 2024-04-29
 

Cargo.toml

@@ -13,6 +13,7 @@ readme = "README.md"
 categories = ["embedded", "no-std", "database", "encoding"]
 keywords = ["mqtt", "embedded", "client"]
 license = "MIT"
+rust-version = "1.77.0"
 
 [dependencies]
 bit_field = "0.10.0"