update min-version passed to bindgen

Author: tesuji

.github/workflows/ci.yml

@@ -59,6 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      # Remember to also update `--rust-target` in `openssl-sys/build/run_bindgen.rs`
       - uses: sfackler/actions/rustup@master
         with:
           version: 1.56.0

openssl-sys/build/run_bindgen.rs

@@ -167,7 +167,7 @@ pub fn run_boringssl(include_dirs: &[PathBuf]) {
     bindgen_cmd
         .arg("-o")
         .arg(out_dir.join("bindgen.rs"))
-        .arg("--rust-target=1.47")
+        .arg("--rust-target=1.56")
         .arg("--ctypes-prefix=::libc")
         .arg("--raw-line=use libc::*;")
         .arg("--no-derive-default")