chore: release v4.0.0 (#937)

## Description

This PR updated the `changeset` entries and `CHANGELOG.md` file for the next v4.0.0 release

Depends-On: #936

---

### 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](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/desmos-labs/desmos/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://docs.cosmos.network/v0.44/building-modules/intro.html)
- [ ] included the necessary unit and integration [tests](https://github.com/desmos-labs/desmos/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] 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](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

@@ -2,6 +2,29 @@
 All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 -->
+## Version 4.0.0
+### Features
+#### Subspaces
+- ([\#866](https://github.com/desmos-labs/desmos/pull/866)) Added support for subspaces sections
+- ([\#886](https://github.com/desmos-labs/desmos/pull/886)) Improved how permissions are managed
+- ([\#919](https://github.com/desmos-labs/desmos/pull/919)) Added the ability to create a GenericSubspaceAuthorization to authorize operations only inside a specific subspace
+
+#### Posts
+- ([\#847](https://github.com/desmos-labs/desmos/pull/847)) Added the new `x/posts` module
+
+#### Reactions
+- ([\#898](https://github.com/desmos-labs/desmos/pull/898)) Added the new `x/reactions` module
+
+#### Reports
+- ([\#860](https://github.com/desmos-labs/desmos/pull/860)) Added the new `x/reports` module
+
+#### Other
+- ([\#822](https://github.com/desmos-labs/desmos/pull/822)) Added CosmWASM messages and queries parsers for all modules
+- ([\#919](https://github.com/desmos-labs/desmos/pull/919)) Added proper support for `x/authz`
+
+### Dependencies
+- ([\#875](https://github.com/desmos-labs/desmos/pull/875)) Updated ibc-go to v3.0.0 and wasmd to v0.27.0
+
 ## Version 3.2.0
 ### Bug Fixes
 #### Supply