Update and fix CI.

.github/workflows/build.yml

@@ -17,16 +17,14 @@ jobs:
       RUSTFLAGS: "-Dwarnings"
     steps:
     - name: Checkout SSI Library
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
-
+    
     - name: Install Rust
-      uses: actions-rs/toolchain@v1
+      uses: dtolnay/rust-toolchain@master
       with:
         toolchain: "1.75.0"
-        profile: minimal
-        override: true
         components: rustfmt, clippy
 
     - uses: Swatinem/rust-cache@v2
@@ -56,22 +54,24 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout SSI Library
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
 
-    - uses: taiki-e/install-action@cargo-hack
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
 
+    - uses: taiki-e/install-action@cargo-hack
     - uses: Swatinem/rust-cache@v2
       with:
         cache-on-failure: "true"
 
     - name: Test each feature
-      run: cargo hack test --each-feature --workspace --exclude ssi --exclude 'ssi-did-test' -- --test-threads=4
+      run: cargo hack test --each-feature --workspace --clean-per-run --exclude ssi --exclude 'ssi-did-test' -- --test-threads=4
 
   semver:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Check semver
       uses: obi1kenobi/cargo-semver-checks-action@v2