feat: Update clap to v4

Cargo.toml

@@ -33,13 +33,13 @@ include = [
 
 [dependencies]
 tree-sitter = "0.20.9"
-clap = { version = "3.2.22", features = [
+clap = { version = "4.0.8", features = [
   "derive",
   "env",
   "unicode",
   "wrap_help",
 ] }
-clap_complete = "3.2.5"
+clap_complete = "4.0.2"
 anyhow = "1.0.65"
 phf = { version = "0.11.1", features = ["macros"] }
 console = "0.15.2"

src/cli.rs

@@ -27,13 +27,13 @@ pub struct Args {
     ///
     /// Text that is in this file but is not in the new file is considered a deletion
     // #[clap(name = "OLD", parse(from_os_str), required_unless_present = "cmd")]
-    #[clap(name = "OLD", parse(from_os_str))]
+    #[clap(name = "OLD")]
     pub old: Option<PathBuf>,
     /// The file that the old file is compared against
     ///
     /// Text that is in this file but is not in the old file is considered an addition
     // #[clap(name = "NEW", parse(from_os_str), required_unless_present = "cmd")]
-    #[clap(name = "NEW", parse(from_os_str))]
+    #[clap(name = "NEW")]
     pub new: Option<PathBuf>,
     /// Manually set the file type for the given files
     ///

src/main.rs

@@ -11,8 +11,8 @@ mod parse;
 use crate::parse::supported_languages;
 use ::console::Term;
 use anyhow::Result;
+use clap::CommandFactory;
 use clap::FromArgMatches;
-use clap::IntoApp;
 use cli::Args;
 use config::{Config, ReadError};
 use formatting::{DisplayParameters, DocumentDiffData};