[MASTER-RELEASE] Detailed Byzanitum-Release Checklist

[holgerd77]

Short term checklist for release day, close after master release, order of tasks DO matter!!

Preparing Dependencies

1. Merge [MASTER-RELEASE] Metro-Byzantium changes common#6 PR
2. Merge [MASTER-RELEASE] Byzantium changes ethereumjs-block#32 PR
3. Merge initial release rustbn.js#2 PR
4. Change ethereumjs-block dependency from [MASTER-RELEASE] Byzantium Release (needs dependency update) ethereumjs-blockchain#34 PR to master branch version
5. Check both ethereumjs-block and ethereumjs-blockchain test build passing
6. Merge [MASTER-RELEASE] Byzantium Release (needs dependency update) ethereumjs-blockchain#34 PR

Master Branch Merge

1. Check all existing test builds for all dependencies pass
2. Update package.json with master branch versions for ethereum-common, ethereumjs-block, rustbn.js and ethereumjs-blockchain, commit
3. Wait for test build to pass
4. One deep breath, maybe wait another 15 min. :-)
5. Merge. Done.