TESTNET: add upgrade handler · scrtlabs/SecretNetwork@19cbd37

directive `//nolint:staticcheck` is unused for linter "staticcheck" (nolintlint)

directive `//nolint:staticcheck` is unused for linter "staticcheck" (nolintlint)

issues found

The following actions use a deprecated Node.js version and will be forced to run on node20: golangci/golangci-lint-action@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Restore cache failed: Dependencies file is not found in /home/runner/work/SecretNetwork/SecretNetwork. Supported file pattern: go.sum

unused-parameter: parameter 'appKeepers' seems to be unused, consider removing or renaming it as _ (revive)

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