add 5.4 upgrade handler

app/upgrades/v5_4/constants.go

@@ -0,0 +1,15 @@
+package v5_4
+
+import (
+	"github.com/cosmic-horizon/qwoyn/app/upgrades"
+)
+
+const (
+	// UpgradeName defines the on-chain upgrade name.
+	UpgradeName = "v5.4.0"
+)
+
+var Upgrade = upgrades.Upgrade{
+	UpgradeName:          UpgradeName,
+	CreateUpgradeHandler: CreateUpgradeHandler,
+}

app/upgrades/v5_4/upgrades.go

@@ -0,0 +1,18 @@
+package v5_4
+
+import (
+	"github.com/cosmic-horizon/qwoyn/app/keepers"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
+)
+
+func CreateUpgradeHandler(
+	mm *module.Manager,
+	configurator module.Configurator,
+	keepers keepers.AppKeepers,
+) upgradetypes.UpgradeHandler {
+	return func(ctx sdk.Context, plan upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
+		return mm.RunMigrations(ctx, configurator, vm)
+	}
+}