feat: added update-clent and IBC update proposals (#860)

## Description

Adds the update-client proposal handler as well as the IBC update proposal handler. Both are critical for managing IBC connections. Specifically, update-client unfreezes stuck client connections and, as a consequence, stuck tokens.

app.go has 3 changed lines that add these features.

closes: #859 

----

### Author Checklist

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please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [x] added appropriate labels to the PR
- [x] targeted the correct branch (see [PR Targeting](https://github.com/umee-network/umee/blob/main/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [x] added a changelog entry to `CHANGELOG.md`
- [x] reviewed "Files changed" and left comments if necessary
- [x] 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](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) 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)

CHANGELOG.md

@@ -46,13 +46,17 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Features
+
+- [860](https://github.com/umee-network/umee/pull/860) Add IBC upgrade and upgrade-client gov proposals.
+
 ### Improvements
 
 - [866](https://github.com/umee-network/umee/pull/866) Make the x/oracle keeper's GetExchangeRateBase method more efficient.
 
 ### API Breaking
 
-- [870](https://github.com/umee-network/umee/pull/870) chore: Move proto v1beta1 to v1.
+- [870](https://github.com/umee-network/umee/pull/870) Move proto v1beta1 to v1.
 
 ## [v2.0.1](https://github.com/umee-network/umee/releases/tag/v2.0.1) - 2022-04-25
 
@@ -62,7 +66,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
-- [829](https://github.com/umee-network/umee/pull/829) Fix `umeed tx leverage liquidate` command args
+- [829](https://github.com/umee-network/umee/pull/829) Fix `umeed tx leverage liquidate` command args.
 
 ### Improvements
 

app/app.go

@@ -82,6 +82,7 @@ import (
 	ibctransfertypes "github.com/cosmos/ibc-go/v2/modules/apps/transfer/types"
 	ibc "github.com/cosmos/ibc-go/v2/modules/core"
 	ibcclient "github.com/cosmos/ibc-go/v2/modules/core/02-client"
+	ibcclientclient "github.com/cosmos/ibc-go/v2/modules/core/02-client/client"
 	ibcclienttypes "github.com/cosmos/ibc-go/v2/modules/core/02-client/types"
 	ibcporttypes "github.com/cosmos/ibc-go/v2/modules/core/05-port/types"
 	ibchost "github.com/cosmos/ibc-go/v2/modules/core/24-host"
@@ -918,6 +919,8 @@ func getGovProposalHandlers() []govclient.ProposalHandler {
 		upgradeclient.ProposalHandler,
 		upgradeclient.CancelProposalHandler,
 		leverageclient.ProposalHandler,
+		ibcclientclient.UpdateClientProposalHandler,
+		ibcclientclient.UpgradeProposalHandler,
 	}
 }