Replace unmaintained actions-rs/* actions in CI workflows (#53)

Basically all of the `actions-rs/*` actions are unmaintained. See
<https://github.com/actions-rs/toolchain/issues/216> for more
information. Due to their age they generate several warnings in
CI runs.

To get rid of those warnings the occurrences of
`actions-rs/toolchain` are replaced by `dtolnay/rust-toolchain`,
and the occurrences of `actions-rs/cargo` are replaced by direct
invocations of `cargo`.

.github/actions/cross-tests/action.yml

@@ -15,12 +15,10 @@ runs:
   steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ inputs.rust }}
-          target: ${{ inputs.target }}
-          override: true
+          targets: ${{ inputs.target }}
       - uses: RustCrypto/actions/cross-install@master
       - if: ${{ inputs.features != 'NO_FEATURE' }}
         run: |

.github/workflows/ascon.yml

@@ -37,12 +37,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          override: true
+          targets: ${{ matrix.target }}
       - run: cargo build --no-default-features --target ${{ matrix.target }}
 
   minimal-versions:
@@ -61,11 +59,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          override: true
       - run: cargo test --no-default-features
       - run: cargo test
       - run: cargo test --all-features

.github/workflows/keccak.yml

@@ -37,12 +37,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          override: true
+          targets: ${{ matrix.target }}
       - run: cargo build --no-default-features --target ${{ matrix.target }}
 
   minimal-versions:
@@ -61,11 +59,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          override: true
       - run: cargo check --no-default-features
       - run: cargo check
       - run: cargo check --features no_unroll
@@ -78,11 +74,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: nightly
-          override: true
       - run: cargo check --features simd
       - run: cargo test --features simd
 
@@ -132,12 +126,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          target: aarch64-unknown-linux-gnu
-          override: true
+          targets: aarch64-unknown-linux-gnu
       - name: Install pre-compiled cross
         run: |
           # We need a recent version for RUSTFLAGS to work.

.github/workflows/workspace.yml

@@ -15,12 +15,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: RustCrypto/actions/cargo-cache@master
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
           components: clippy
-          profile: minimal
-          override: true
       - run: cargo clippy --all -- -D warnings
 
   rustfmt:
@@ -30,15 +28,10 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install stable toolchain
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
           components: rustfmt
-          profile: minimal
-          override: true
 
       - name: Run cargo fmt
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
+        run: cargo fmt --all -- --check