[librsvg/update-clap] Make the 'output' option take a PathBuf value parser

[Federico Mena Quintero <federico src gnome org>]

commit 6a4f860895c5a2d93e4a4d5e90db913527a62709
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Sep 20 10:05:30 2022 -0500

    Make the 'output' option take a PathBuf value parser

 src/bin/rsvg-convert.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/bin/rsvg-convert.rs b/src/bin/rsvg-convert.rs
index 8f8efd6ed..da1f3bdb5 100644
--- a/src/bin/rsvg-convert.rs
+++ b/src/bin/rsvg-convert.rs
@@ -896,7 +896,7 @@ fn parse_args() -> Result<Converter, Error> {
             clap::Arg::with_name("output")
                 .short('o')
                 .long("output")
-                .empty_values(false)
+                .value_parser(clap::value_parser!(PathBuf))
                 .help("Output filename [defaults to stdout]"),
         )
         .arg(
@@ -1066,8 +1066,8 @@ fn parse_args() -> Result<Converter, Error> {
         language,
         input,
         output: matches
-            .value_of_os("output")
-            .map(PathBuf::from)
+            .get_one::<PathBuf>("output")
+            .cloned()
             .map(Output::Path)
             .unwrap_or(Output::Stdout),
         testing: matches.is_present("testing"),