ci: pin tokio to 1.29.1 to build with MSRV 1.57.0

also:
- pin any version of tempfile to 3.6.0
- pin cc to 1.0.81
- pin flate2 to 1.0.26

.github/workflows/cont_integration.yml

@@ -54,8 +54,11 @@ jobs:
           cargo update
           cargo update -p log --precise 0.4.18
           cargo update -p hashlink --precise 0.8.0
-          cargo update -p tempfile:3.7.0 --precise 3.6.0
+          cargo update -p tempfile --precise 3.6.0
           cargo update -p base64ct --precise 1.5.3
+          cargo update -p cc --precise 1.0.81
+          cargo update -p tokio --precise 1.29.1
+          cargo update -p flate2 --precise 1.0.26
       - name: Build
         run: cargo build --no-default-features --features repl,${{ matrix.features }} --locked
       - name: Clippy