build: bump msrv to 1.60.0

the log crates requires this after Debian 12/bookworm released

.github/workflows/rust.yml

@@ -52,7 +52,7 @@ jobs:
           # Sometimes old rust versions don't yet have the lints (allow unknown) or don't have fixes in lints (false positives -> don't error, just warn).
           # When a certain distro is a target look up its version: https://repology.org/project/rust/versions
           - os: ubuntu-latest
-            toolchain: 1.56.1
+            toolchain: 1.60.0
             clippyargs: -A unknown-lints
             features: --all-features
     steps:

Cargo.toml

@@ -6,7 +6,7 @@ license = "MIT"
 repository = "https://github.com/EdJoPaTo/tui-rs-tree-widget"
 authors = ["EdJoPaTo <tui-tree-widget-rust-crate@edjopato.de>"]
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.60.0"
 keywords = ["tui", "terminal", "tree", "widget"]
 categories = ["command-line-interface"]
 include = ["src/**/*", "README.md"]

examples/example.rs

@@ -61,7 +61,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     terminal.show_cursor()?;
 
     if let Err(err) = res {
-        println!("{:?}", err);
+        println!("{err:?}");
     }
 
     Ok(())