Update CI script (#26)

* Update grcov version, set CARGO_INCREMENTAL=0 for entire workflow
* Various small improvements

.github/workflows/crate.yml

@@ -8,13 +8,15 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+  GRCOV_VERSION: v0.8.19
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests
@@ -24,12 +26,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install Rust nightly and miri
-      uses: dtolnay/rust-toolchain@stable
+      uses: dtolnay/rust-toolchain@nightly
       with:
-        toolchain: nightly
         components: miri, rust-src
 
     - name: Run miri
@@ -43,40 +44,31 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
-    - name: Install Rust stable
+    - name: Install Rust stable and LLVM tools
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: stable
+        components: llvm-tools-preview
 
     - name: Install grcov
-      env:
-        GRCOV_LINK: https://github.com/mozilla/grcov/releases/download
-        GRCOV_VERSION: v0.8.7
-      run: |
-        curl -L "$GRCOV_LINK/$GRCOV_VERSION/grcov-x86_64-unknown-linux-musl.tar.bz2" |
-        tar xj -C $HOME/.cargo/bin
-    - name: Install llvm-tools-preview
-      run: |
-        rustup component add llvm-tools-preview
+      run: >
+        curl -L "https://github.com/mozilla/grcov/releases/download/$GRCOV_VERSION/grcov-x86_64-unknown-linux-musl.tar.bz2"
+        | tar xj -C "$HOME/.cargo/bin"
 
     - name: Run cargo clean
-      run: |
-        cargo clean
+      run: cargo clean
 
     - name: Run tests
       env:
-        CARGO_INCREMENTAL: 0
         LLVM_PROFILE_FILE: "{{ name }}-%p-%m.profraw"
         RUSTFLAGS: >
           -Cinstrument-coverage -Ccodegen-units=1 -Clink-dead-code
           -Coverflow-checks=off
         RUSTDOCFLAGS: >
           -Cinstrument-coverage -Ccodegen-units=1 -Clink-dead-code
           -Coverflow-checks=off
-      run: |
-        cargo test --verbose
+      run: cargo test
     - name: Get coverage data for codecov
       run: |
         grcov . --binary-path ./target/debug/ -s . -t lcov --branch \