feat: update slinky => connect/v2

[beer-1]

Description

Closes: #XXXX

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title, you can find examples of the prefixes below:

• confirmed ! in the type prefix if API or client breaking change
• targeted the correct branch
• provided a link to the relevant issue or specification
• reviewed "Files changed" and left comments if necessary
• included the necessary unit and integration tests
• updated the relevant documentation or specification, including comments for documenting Go code
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed all author checklist items have been addressed
• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.73%. Comparing base (7c93065) to head (8a3f885).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #67   +/-   ##
=======================================
  Coverage   64.73%   64.73%           
=======================================
  Files          39       39           
  Lines        3207     3207           
=======================================
  Hits         2076     2076           
  Misses        956      956           
  Partials      175      175           

Files with missing lines	Coverage Δ
app/genesis.go	91.66% <100.00%> (ø)
app/keepers/keepers.go	98.59% <100.00%> (ø)
app/keepers/keys.go	93.54% <ø> (ø)
app/modules.go	100.00% <100.00%> (ø)