Bump version for new release: 0.57.0

Merge pull request #897 from argotorg/release-0.56-new

Fix release action

Merge pull request #805 from ethereum/fix-release

Update cabal to 0.55.1

Merge pull request #800 from ethereum/fixing-missing-sar

Adding missing SAR simplification

Merge pull request #617 from ethereum/release-0.54.2

Update release

Merge pull request #616 from ethereum/release-0.54.1

Release candidate 0.54.1

Merge pull request #611 from ethereum/release-0.54.0

Preparing release 0.54.0

Merge pull request #460 from ethereum/prepare-0.53.0

Prepare 0.53.0 release

0.52.0

Merge pull request #310 from ethereum/prepare-0.51.3

Prepare 0.51.3 release