Bump MSRV to 1.71 for windows-link

Author: djc

.github/workflows/libloading.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust_toolchain: [nightly, stable, 1.63.0]
+        rust_toolchain: [nightly, stable, 1.71.0]
         os: [ubuntu-latest, windows-latest, macOS-latest]
     timeout-minutes: 20
     steps:
@@ -24,7 +24,7 @@ jobs:
       - run: rustup default ${{ matrix.rust_toolchain }}
       - run: rustup component add clippy
       - run: cargo update -p libc --precise 0.2.155
-        if: ${{ matrix.rust_toolchain == '1.63.0' }}
+        if: ${{ matrix.rust_toolchain == '1.71.0' }}
       - run: cargo clippy
       - run: cargo test -- --nocapture
       - run: cargo test --release -- --nocapture

Cargo.toml

@@ -12,7 +12,7 @@ readme = "README.mkd"
 description = "Bindings around the platform's dynamic library loading primitives with greatly improved memory safety."
 keywords = ["dlopen", "load", "shared", "dylib"]
 categories = ["api-bindings"]
-rust-version = "1.56.0"
+rust-version = "1.71.0"
 edition = "2015"
 
 [target.'cfg(windows)'.dependencies.windows-targets]

src/safe.rs

@@ -261,7 +261,6 @@ impl<'lib, T> Symbol<'lib, T> {
     /// was loaded from.
     pub unsafe fn try_as_raw_ptr(self) -> Option<*mut raw::c_void> {
         Some(
-            #[allow(unused_unsafe)] // 1.56.0 compat
             unsafe {
                 // SAFE: the calling function has the same soundness invariants as this callee.
                 self.into_raw()