Bump MSRV to 1.79

It's what's in c9s right now, and I want to make use of a
newer API.

Signed-off-by: Colin Walters <[email protected]>

Author: cgwalters

cli/Cargo.toml

@@ -6,7 +6,8 @@ license = "MIT OR Apache-2.0"
 repository = "https://github.com/containers/bootc"
 readme = "README.md"
 publish = false
-rust-version = "1.63.0"
+# For now don't bump this above what is currently shipped in RHEL9.
+rust-version = "1.75.0"
 default-run = "bootc"
 
 # See https://github.com/coreos/cargo-vendor-filterer

lib/Cargo.toml

@@ -6,6 +6,8 @@ name = "bootc-lib"
 readme = "README.md"
 repository = "https://github.com/containers/bootc"
 version = "0.1.14"
+# For now don't bump this above what is currently shipped in RHEL9;
+# also keep in sync with the version in cli.
 rust-version = "1.75.0"
 build = "build.rs"