Upgrade to latest stable Rust and edition 2021

Cargo.toml

@@ -3,8 +3,8 @@ name = "exa"
 description = "A modern replacement for ls"
 authors = ["Benjamin Sago <ogham@bsago.me>"]
 categories = ["command-line-utilities"]
-edition = "2018"
-rust-version = "1.56.1"
+edition = "2021"
+rust-version = "1.63.0"
 exclude = ["/devtools/*", "/Justfile", "/Vagrantfile", "/screenshots.png"]
 readme = "README.md"
 homepage = "https://the.exa.website/"

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.56.1"
+channel = "1.63.0"