Upgrade clap to v4 (#678)

cli/src/commands/codegen.rs

@@ -25,10 +25,10 @@ use subxt_codegen::DerivesRegistry;
 #[derive(Debug, ClapParser)]
 pub struct Opts {
     /// The url of the substrate node to query for metadata for codegen.
-    #[clap(name = "url", long, parse(try_from_str))]
+    #[clap(name = "url", long, value_parser)]
     url: Option<Uri>,
     /// The path to the encoded metadata file.
-    #[clap(short, long, parse(from_os_str))]
+    #[clap(short, long, value_parser)]
     file: Option<PathBuf>,
     /// Additional derives
     #[clap(long = "derive")]

cli/src/commands/compatibility.rs

@@ -29,13 +29,13 @@ use subxt_metadata::{
 #[derive(Debug, ClapParser)]
 pub struct Opts {
     /// Urls of the substrate nodes to verify for metadata compatibility.
-    #[clap(name = "nodes", long, use_delimiter = true, parse(try_from_str))]
+    #[clap(name = "nodes", long, use_value_delimiter = true, value_parser)]
     nodes: Vec<Uri>,
     /// Check the compatibility of metadata for a particular pallet.
     ///
     /// ### Note
     /// The validation will omit the full metadata check and focus instead on the pallet.
-    #[clap(long, parse(try_from_str))]
+    #[clap(long, value_parser)]
     pallet: Option<String>,
 }
 

cli/src/commands/metadata.rs

@@ -31,7 +31,7 @@ pub struct Opts {
     #[clap(
         name = "url",
         long,
-        parse(try_from_str),
+        value_parser,
         default_value = "http://localhost:9933"
     )]
     url: Uri,