Update dependencies (#797)

* Update hash to docker image

* cargo update

* Update rust nightly version

* Revert to older nightly because of some new clippy warnings

Author: Niederb

.github/workflows/ci.yml

@@ -240,7 +240,7 @@ jobs:
 
       - name: Run latest node
         run: |
-          docker run -p 9944:9944 -p 9933:9933 -p 30333:30333 paritypr/substrate:master-18228a9b --dev --rpc-external &
+          docker run -p 9944:9944 -p 9933:9933 -p 30333:30333 paritypr/substrate:master-178e699c --dev --rpc-external &
 
       - name: Wait until node has started
         run: sleep 20s