Update github actions to pass, and bump verison

.github/workflows/ci.yml

@@ -17,10 +17,10 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Cargo cache
-        uses: actions/cache@v1
+        uses: actions/cache@v5
         with:
           path: ~/.cargo
           key: cargo-${{ matrix.rust }}
@@ -31,6 +31,10 @@ jobs:
           toolchain: ${{ matrix.rust }}
           override: true
 
+      - name: Downgrade libloading
+        if: ${{ matrix.rust == '1.56.0' }}
+        run: cargo update -p libloading --precise 0.8.7
+
       - name: Test link
         uses: actions-rs/cargo@v1
         with:

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dlib"
-version = "0.5.2"
+version = "0.5.3"
 repository = "https://github.com/elinorbgr/dlib"
 authors = ["Elinor Berger <elinor@safaradeg.net>"]
 license = "MIT"
@@ -10,6 +10,12 @@ readme = "README.md"
 keywords = ["dylib", "dlopen"]
 categories = ["api-bindings"]
 edition = "2021"
+rust-version = "1.56"
 
 [dependencies]
 libloading = ">=0.7, <0.9"
+
+[workspace]
+members = [
+    "dlib-test",
+]

dlib-test/Cargo.toml

@@ -1,9 +1,10 @@
 [package]
 name = "dlib-test"
 version = "0.1.0"
-authors = ["Victor Berger <victor.berger@m4x.org>"]
-edition = "2018"
+authors = ["Elinor Berger <elinor@safaradeg.net>"]
+edition = "2021"
 publish = false
+rust-version = "1.56"
 
 [dependencies]
 dlib = { path = "../" }

dlib-test/src/lib.rs

@@ -34,7 +34,6 @@ mod tests {
         let angle = 1.8;
         let cosinus = unsafe { ffi_dispatch!(M_STATIC, cos, angle) };
         assert_eq!(cosinus, angle.cos());
-
     }
 
     #[cfg(feature = "sin")]