Merge 'tokio-1.21.2' into 'master' (#5059)

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ env:
   # Change to specific Rust release to pin
   rust_stable: stable
   rust_nightly: nightly-2022-07-26
-  rust_clippy: 1.52.0
+  rust_clippy: 1.56.0
   # When updating this, also update:
   # - README.md
   # - tokio/README.md
@@ -297,8 +297,9 @@ jobs:
           toolchain: ${{ env.rust_min }}
           override: true
       - uses: Swatinem/rust-cache@v1
-      - name: "test --workspace --all-features"
-        run: cargo check --workspace --all-features
+      - name: "test --all-features"
+        run: cargo check --all-features
+        working-directory: tokio
 
   minimal-versions:
     name: minimal-versions