add: `rust-version` (msrv) field to `Cargo.toml`
* specifies the minimum version the package can be compiled with,
may be ignored with `--ignore-rust-version` option
ref:
@@ -9,6 +9,7 @@ repository = "https://github.com/zellij-org/zellij"
homepage = "https://zellij.dev"
include = ["src/**/*", "assets/plugins/*", "assets/layouts/*", "assets/config/*", "LICENSE.md", "README.md", "!**/*_test.*", "!**/tests/**/*"]
resolver = "2"
+rust-version = "1.56"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
