chore: bump rust compiler version to 1.73.0 for JVM and python builds

.github/workflows/cont_integration.yml

@@ -17,10 +17,8 @@ jobs:
     strategy:
       matrix:
         rust:
-          - version: 1.67.0
+          - version: 1.73.0
             clippy: true
-          # TODO 1: Should we keep this? We'll need to pin dependencies
-          # - version: 1.61.0 # MSRV
     steps:
       - name: "Checkout"
         uses: actions/checkout@v3
@@ -50,12 +48,6 @@ jobs:
       - name: "Update toolchain"
         run: rustup update
 
-      - name: "Pin dependencies for MSRV"
-        if: matrix.rust.version == '1.61.0'
-        run: |
-          cargo update -p hashlink --precise "0.8.1"
-          cargo update -p tokio --precise "1.29.1"
-          cargo update -p flate2 --precise "1.0.26"
       - name: "Build"
         run: cargo build