ci: pin tokio to 1.38.1 to support MSRV 1.63

.github/workflows/cont_integration.yml

@@ -36,6 +36,7 @@ jobs:
           cargo update -p proptest --precise "1.2.0"
           cargo update -p url --precise "2.5.0"
           cargo update -p cc --precise "1.0.105"
+          cargo update -p tokio --precise "1.38.1"
       - name: Build
         run: cargo build ${{ matrix.features }}
       - name: Test

README.md

@@ -74,6 +74,7 @@ cargo update -p home --precise "0.5.5"
 cargo update -p proptest --precise "1.2.0"
 cargo update -p url --precise "2.5.0"
 cargo update -p cc --precise "1.0.105"
+cargo update -p tokio --precise "1.38.1"
 ```
 
 ## License