upgrade to polkadot-v1.6.0 (#265)

* upgrade to polkadot-v1.6.0 deps

* apply necessary code changes

* fix build setup

* fixes

* fix chain spec

* cleanup

* bump versions

* fix benchmakrs

* taplo

* add migration for xcmp queue

* bump srtool GHA

* fix review comments

* fix benchmarking

* rerun benchmarks

* fix spec generation

* regenesis rococo

* lock

.github/workflows/ci.yml

@@ -246,7 +246,7 @@ jobs:
 
       - name: Srtool build
         id: srtool_build
-        uses: chevdor/srtool-actions@v0.7.0
+        uses: chevdor/srtool-actions@v0.9.2
         with:
           image: paritytech/srtool
           chain: ${{ matrix.runtime }}