Bump MSRV to 1.47

On Windows, we depend on blocking and async-task that require Rust 1.47.

Author: taiki-e

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
         # When updating this, the reminder to update the minimum supported
         # Rust version in Cargo.toml.
-        rust: ['1.46']
+        rust: ['1.47']
     steps:
       - uses: actions/checkout@v3
       - name: Install Rust

Cargo.toml

@@ -6,7 +6,7 @@ name = "async-process"
 version = "1.6.0"
 authors = ["Stjepan Glavina <[email protected]>"]
 edition = "2018"
-rust-version = "1.46"
+rust-version = "1.47"
 description = "Async interface for working with processes"
 license = "Apache-2.0 OR MIT"
 repository = "https://github.com/smol-rs/async-process"