- Merge branch 'develop' into release/westend-v0.9.9
Remove "invalid" collection mode, update frontier for sponsoring fixes, readme update, setVariableMetadata usage due CORE-37
- update rust and polkadot version
tests/README.md664 BsourcehistoryRemove "invalid" collection mode, update frontier for sponsoring fixes, readme update, setVariableMetadata usage due CORE-37