v1.9.11-statediff-0.0.8

This is an internal release to enable us to work with the statediffing code using go modules. This release is rebased on top of master branch go-etheruem v1.9.11.

Updates:

• Emit code and codehash pairs for all created contracts
• Endpoint for collecting all code and code hashes at a given block height (for filling in what we missed before updating to emit code and codehash in the payload)