Raise required compiler to Rust 1.68

Author: dtolnay

.github/workflows/ci.yml

@@ -57,7 +57,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: [1.67.0, 1.65.0]
+        rust: [1.68.0]
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v6

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 keywords = ["error", "error-handling"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/dtolnay/anyhow"
-rust-version = "1.65"
+rust-version = "1.68"
 
 [features]
 default = ["std"]