Reduce msrv to 1.63 (#1158)

* Reduce msrv to 1.63

* Update main.yml

Author: NobodyXu

Diff for: .github/workflows/main.yml

@@ -198,7 +198,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     env:
-      MSRV: 1.67.0
+      MSRV: 1.63.0
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust

Diff for: Cargo.toml

@@ -17,7 +17,7 @@ categories = ["development-tools::build-utils"]
 # The binary target is only used by tests.
 exclude = ["/.github", "tests", "src/bin"]
 edition = "2018"
-rust-version = "1.67"
+rust-version = "1.63"
 
 [dependencies]
 jobserver = { version = "0.1.30", default-features = false, optional = true }