chore(deps): bump github.com/ethereum/go-ethereum from 1.9.3 to 1.9.7

[dependabot-preview]

Bumps github.com/ethereum/go-ethereum from 1.9.3 to 1.9.7.

Release notes

Sourced from github.com/ethereum/go-ethereum's releases.

Quad Kicker (v1.9.7)

Geth v1.9.7 is our almost-usual biweekly maintenance release (one release skipped due to Devcon).

This release is a bit more special, however, as it finally initializes the Ethereum mainnet Istanbul fork block 9069000, targeted to arrive around the 4th of December! Please update your mainnet Geth nodes to v1.9.7 (or newer) as soon as possible to avoid surprises!

Beside hard-coding Istanbul, we've shipped:

• Enforce proper fork orders to avoid partially initialized private networks (#20169).
• Deploy eth/64, extending the protocol handshake with a forkid field (#20140).
• Integrate Istanbul configuration support into puppeth for private networks (#19926).
• Small tweaks to the ABI to Go binding generator to correctly handle more types (#20179).
• Various internal light client capacity accounting optimizations for fairer servicing (#20077).
• Remove some unnecessary redundancy from internal state sync data structures (#19929).
• Avoid some unnecessary memory copying in the EVM, speeding up certain opcodes (#20177).
• Extend the forkid validation to catch two more corner cases, courtesy of @​ritzdorf (#20220).
• Continue work towards the DNS and ENR based secondary discovery protocol (#20168, #20132).
• Rework the PPA dependency management, supporting the latest Go releases from now on (#20240).

And fixed:

• Fix a tiny data race in the downloader (#20204).
• Fix some parsing issues in the EVM assembly parser (#20210).
• Fix IPC paths in Clef on Windows to use proper Windows pipes and not Unix pipes (#20166).
• Fix an issue where 2 config file fields were always overwritten by the CLI, even if unset (#20167).
• Fix the evm binary so that it gracefully ignores useless whitespace around code snippets (#20211).
• Fix a gas estimation issue for contracts that check tx.gasprice when using the Go bindings (#20189).

There is also an ongoing effort of porting over all our documentations from the GitHub Wiki pages, cleaning out stale information, getting relevant things up to date (#20229). It's a lot of work and we don't even know where to start, so contributions are more than welcome!

For a full rundown of the changes please consult the Geth 1.9.7 release milestone.

---

As with all our previous releases, you can find the:

• Pre-built binaries for all platforms on our downloads page.
• Docker images published under ethereum/client-go.
• Ubuntu packages in our Launchpad PPA repository.
• OSX packages in our Homebrew Tap repository.

Elasa (v1.9.6)

Geth v1.9.6 is a bug fix release, which improves light client sync to not start from zero when a CHT checkpoint is available (#20120).

This release also adds support for EIP-1898: all state-related RPC methods now support specifying block hashes as well as block numbers. This affects eth_getBalance, eth_getStorageAt, eth_getTransactionCount, eth_getCode, eth_call and eth_getProof (#19491).

Minor changes:

• LES servers now advertise the les capability via ENR (#20145)
• New metrics for p2p bandwidth per protocol message (#20133)
• LevelDB seek compaction is disabled, reducing disk I/O (#20130)

... (truncated)

Commits

• a718daa params: release Geth v1.9.7
• b9bac1f les: fix and slim the unit tests of les (#20247)
• fc3661f Merge pull request #20248 from karalabe/cht-1.9.7
• 9948724 params: hard-code new CHTs for the 1.9.7 release
• c702bd7 travis: bump linter to Go 1.13.x
• 734e00a travis, build, internal: use own Go bundle for PPA builds (#20240)
• b566cfd core/evm: avoid copying memory for input in calls (#20177)
• 7a6d5d0 cmd/puppeth: integrate istanbul into puppeth (#19926)
• 0ff7380 Merge pull request #20231 from SamuelMarks/go1.13.4
• 0ce5e11 les: rework clientpool (#20077)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #36.