Fix msrv. remove codecov from test.yaml

.github/workflows/check.yaml

@@ -78,7 +78,7 @@ jobs:
     # https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
     strategy:
       matrix:
-        msrv: [1.56.1] # 2021 edition requires 1.56
+        msrv: [1.60.0] # 2021 edition requires 1.56
     name: ubuntu / ${{ matrix.msrv }}
     steps:
       - uses: actions/checkout@v3

.github/workflows/test.yaml

@@ -65,25 +65,3 @@ jobs:
         run: cargo generate-lockfile
       - name: cargo test
         run: cargo test --locked --all-features --all-targets
-  coverage:
-    runs-on: ubuntu-latest
-    name: ubuntu / stable / coverage
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: llvm-tools-preview
-      - name: cargo install cargo-llvm-cov
-        uses: taiki-e/install-action@cargo-llvm-cov
-      - name: cargo generate-lockfile
-        if: hashFiles('Cargo.lock') == ''
-        run: cargo generate-lockfile
-      - name: cargo llvm-cov
-        run: cargo llvm-cov --locked --all-features --lcov --output-path lcov.info
-      - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3
-        with:
-          fail_ci_if_error: true