feat: add v5.3.0 upgrade handler

desmos-labs / desmos

Improving the well-being of users on social networks through the blockchain technology.

Apache License 2.0

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Description

This PR adds the v5.3.0 upgrade handler that also takes care of setting all validator's commission rate to the on-chain minimum, if it's lower than that.

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
[ ] added ! to the type prefix if API or client breaking change
[ ] targeted the correct branch (see PR Targeting)
[ ] provided a link to the relevant issue or specification
[ ] followed the guidelines for building modules
[ ] included the necessary unit and integration tests
[ ] added a changelog entry to CHANGELOG.md
[ ] included comments for documenting Go code
[ ] updated the relevant documentation or specification
[ ] reviewed "Files changed" and left comments if necessary
[ ] confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add 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 ! in the type prefix if API or client breaking change
[ ] confirmed all author checklist items have been addressed
[ ] reviewed state machine logic
[ ] reviewed API design and naming
[ ] reviewed documentation is accurate
[ ] reviewed tests and test coverage
[ ] manually tested (if applicable)

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (8830419) 80.49% compared to head (292f65d) 80.49%. Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1210 +/- ## ======================================= Coverage 80.49% 80.49% ======================================= Files 218 218 Lines 18289 18290 +1 ======================================= + Hits 14722 14723 +1 Misses 2955 2955 Partials 612 612 ``` | [Files Changed](https://app.codecov.io/gh/desmos-labs/desmos/pull/1210?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=desmos-labs) | Coverage Δ | | |---|---|---| | [app/upgrades.go](https://app.codecov.io/gh/desmos-labs/desmos/pull/1210?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=desmos-labs#diff-YXBwL3VwZ3JhZGVzLmdv) | `100.00% <100.00%> (ø)` | |

desmos-labs / desmos