chore(ci): clean up workflow + harden workflow by setting default permission to read only

.github/workflows/ci.yml

@@ -1,5 +1,8 @@
 name: CI
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [main]
@@ -27,20 +30,12 @@ jobs:
           - rust: "1.88" # MSRV
             flags: "--all-features"
     steps:
-      - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.rust }}
-      - name: Install Anvil
-        uses: foundry-rs/foundry-toolchain@v1
+      - uses: actions/checkout@v5
         with:
-          version: nightly
-      - name: Install test binaries
-        shell: bash
-        run: ./.github/scripts/install_test_binaries.sh
-      - uses: Swatinem/rust-cache@v2
+          persist-credentials: false
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          cache-on-failure: true
+          toolchain: ${{ matrix.rust }}
       # Only run tests on latest stable and above
       - name: Install cargo-nextest
         if: ${{ matrix.rust != '1.88' }} # MSRV
@@ -56,34 +51,23 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true
       - run: cargo test --workspace --doc
       - run: cargo test --all-features --workspace --doc
 
-  no-std:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-    steps:
-      - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          target: riscv32imac-unknown-none-elf
-      - uses: taiki-e/install-action@cargo-hack
-      - uses: Swatinem/rust-cache@v2
-        with:
-          cache-on-failure: true
-      - name: check
-        run: ./scripts/check_no_std.sh
-
   feature-checks:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
       - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@cargo-hack
       - uses: Swatinem/rust-cache@v2
@@ -96,23 +80,24 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
+      - uses: actions/checkout@v5
         with:
-          toolchain: stable
-          components: clippy
+          persist-credentials: false
+      - uses: dtolnay/rust-toolchain@clippy
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true
-      - run: cargo +stable clippy --workspace --all-targets --all-features
+      - run: cargo clippy --workspace --all-targets --all-features
         env:
           RUSTFLAGS: -Dwarnings
 
   docs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
       - uses: dtolnay/rust-toolchain@nightly
       - uses: Swatinem/rust-cache@v2
         with:
@@ -125,7 +110,9 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
       - uses: dtolnay/rust-toolchain@nightly
         with:
           components: rustfmt
@@ -137,10 +124,10 @@ jobs:
   ci-success:
     runs-on: ubuntu-latest
     if: always()
+    permissions: {}
     needs:
       - test
       - doctest
-      - no-std
       - feature-checks
       - clippy
       - docs