[librsvg/bilelmoussaoui/new-gtk-rs-stack: 20/23] update to 2021 edition

[Federico Mena Quintero <federico src gnome org>]

commit 507d930f7874337ef636ef805667524c6d8d2134
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Tue Dec 7 21:00:28 2021 +0100

    update to 2021 edition
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/634>

 Cargo.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Cargo.toml b/Cargo.toml
index c200e7b69..fde9ecfe5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "librsvg"
 version = "2.53.0"
 authors = ["Federico Mena Quintero <federico gnome org>"]
 build = "build.rs"
-edition = "2018"
+edition = "2021"
 
 [package.metadata.system-deps]
 cairo-pdf = { version = "1.16", optional = true }