Require rust 1.57

This is required by latest os_str_bytes

Author: fornwall

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        rust: ["1.56.1", "1.65.0"]
+        rust: ["1.57.0", "1.65.0"]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout source

Cargo.toml

@@ -2,6 +2,7 @@
 name = "rust-script"
 version = "0.22.0"
 edition = "2021"
+rust-version = "1.57"
 authors = ["Fredrik Fornwall <fredrik@fornwall.net>"]
 description = "Command-line tool to run Rust \"scripts\" which can make use of crates."
 homepage = "https://rust-script.org"