Merge pull request ethereum#12426 from ethereum/setDateFor0811

Set release date for 0.8.11

Merge pull request ethereum#12255 from ethereum/setReleaseDate

Sort changelog and set release date.

Merge pull request ethereum#12056 from ethereum/setReleaseDatefro089

Set release date.

Merge pull request ethereum#12035 from ethereum/setReleaseDate

Set release date.

Merge pull request ethereum#11763 from ethereum/basefee-hasOpcode

Allow basefee as Yul identifier for EVMVersion < london

Merge pull request ethereum#11566 from ethereum/prepare086

Prepare release of 0.8.6.

Merge pull request ethereum#11505 from ethereum/prepareChanegloge367

Sort changelog.

Merge pull request ethereum#11279 from ethereum/changelog084

Prepare changelog for 0.8.4.

Merge pull request ethereum#11140 from ethereum/prepare083

Prepare changelog for 0.8.3.

Merge pull request ethereum#11029 from ethereum/setreleasedatefor082

Set release date and sort changelog.