* parity-version: mark 2.0.8 stable as critical
* Use signed 256-bit integer for sstore gas refund substate (#9746)
* Add signed refund
* Use signed 256-bit integer for sstore gas refund substate
* Fix tests
* Remove signed mod and use i128 directly
* Fix evm test case casting
* Fix jsontests ext signature
* Add --force to cargo audit install script (#9735)
* heads ref not present for branches beta and stable (#9741)
* aura: fix panic on extra_info with unsealed block (#9755)
* aura: fix panic when unsealed block passed to extra_info
* aura: use hex formatting for EmptyStep hashes
* aura: add test for extra_info
ef8f95e007