Specify and document MSRV for 0.26 (#798)

As of 318f810, crossterm uses RFC
2795 implicit named arguments, which shipped in Rust 1.58.

Co-authored-by: Timon <[email protected]>

Author: Wilfred

CHANGELOG.md

@@ -23,6 +23,7 @@
 ## Breaking ⚠️
 - Remove `SetCursorShape` in favour of `SetCursorStyle`.  (#742)
 - Make Windows resize event match `terminal::size` (#714)
+- Rust 1.58 or later is now required.
 - Add key release event for windows. (#745)
 
 # Version 0.25.0

Cargo.toml

@@ -10,6 +10,7 @@ keywords = ["event", "color", "cli", "input", "terminal"]
 exclude = ["target", "Cargo.lock"]
 readme = "README.md"
 edition = "2021"
+rust-version = "1.58.0"
 categories = ["command-line-interface", "command-line-utilities"]
 
 [lib]