Bump github.com/attestantio/go-eth2-client from 0.16.4 to 0.19.5

[dependabot]

Bumps github.com/attestantio/go-eth2-client from 0.16.4 to 0.19.5.

Changelog

Sourced from github.com/attestantio/go-eth2-client's changelog.

dev:

• standardise names of options
• add common options (currently just timeout) to options structs

0.19.4:

• revert SubmitProposal() to use v1 of the API

0.19.0:

• major rework of API; see docs/0.19-changes.md for details

0.18.3:

• do not crash if beacon state is unavailable

0.18.2:

• add 'withdrawable done' state to validators
• use JSON metadata if not present in HTTP header

0.18.1:

• add blinded block contents
• add helpers to versioned signed blinded beacon block
• add debug forkchoice endpoint support
• add ProposerIndex() to BlindedBlocks
• add helpers to versioned signed blinded beacon block
• add BlockHash() to versioned signed beacon block
• add ExecutionBlockHash() to versioned signed beacon block
• rename data gas fields to blob gas for 1.4.0-beta1

0.18.0:

• support Graffiti, ProposerIndex and RandaoReveal on VersionedBeaconBlock
• use SSZ instead of JSON where available

0.17.0:

• reworked JSON parsing for custom types to make easier to transition to another parser in future
• added Deneb spec types

Commits

• ca28010 Bump version.
• 59c7091 Merge pull request #92 from attestantio/standard-errors
• bee8627 Provide standard errors for API.
• 486b9e9 Merge pull request #90 from attestantio/deneb-beta-4
• 2ebcf2e Re-add tests for signed block contents.
• 4338490 Reinstate tests.
• 88ad8cf Update JSON for block contents.
• d2a9d9a Error on unsupported version.
• 53971bd Update SSZ.
• 4bce626 Fix tests and KZG commitment inclusion proof codecs.
• Additional commits viewable in compare view

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[codecov-commenter]

Codecov Report

Merging #553 (4013d41) into main (bce5669) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main     #553   +/-   ##
=======================================
  Coverage   33.26%   33.26%           
=======================================
  Files          24       24           
  Lines        5090     5090           
=======================================
  Hits         1693     1693           
  Misses       3178     3178           
  Partials      219      219           

Flag	Coverage Δ
unittests	33.26% <ø> (ø)

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[dependabot]

Superseded by #556.