ci: bump MSRV b/c of if .. else

Author: dr-orlovsky

.github/workflows/build.yml

@@ -81,7 +81,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toolchain: [ nightly, beta, stable, 1.60.0 ]
+        toolchain: [ nightly, beta, stable, 1.65.0 ]
     steps:
       - uses: actions/checkout@v2
       - name: Install rust ${{ matrix.toolchain }}

Cargo.toml

@@ -10,7 +10,7 @@ keywords = ["reactor", "networking", "patterns", "concurrency", "poll"]
 categories = ["concurrency", "asynchronous", "network-programming", "rust-patterns"]
 homepage = "https://github.com/rust-amplify"
 repository = "https://github.com/rust-amplify/io-reactor"
-rust-version = "1.60"
+rust-version = "1.65" # Due to if ... let clause
 edition = "2021"
 license = "Apache-2.0"
 readme = "README.md"