Update ChangeLog for upcoming tag 3.1.0

CHANGELOG.md

@@ -2,6 +2,37 @@
 
 The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
 
+## 3.1.0
+
+### Added
+
+- Suppressions allow now deleting an address passing an optional tag (#643 by @iwahara)
+- Allow both `^1.0` and `^2.0` for `php-http/guzzle6-adapter` (#680 by @boboldehampsink)
+- Add support for Mailing List `reply_preference` parameter (#684 by @twoonesixdigital)
+- Add support for `Force DKIM Authority` when creating a Domain (#686 by @Tiboonn)
+- Add support for PHP 7.4 (#698 by @snapshotpl)
+- Allow assigning a domain to a list of ips during creation (#703 by @josephshanak)
+- Add unmapped `log-level` property for Events (#704 by @uavn)
+
+### Fixed
+
+- Provide the Member's name just when it's not `null` (#639 by @indapublic)
+- Fix typehint for Message `ShowResponse::getContentIdMap()` (#664 by @lvdhoorn)
+- Fix endpoint for Domain's API (#668 by @tomschlick)
+- Webhook support for array handling (#675 by @martin-sanjuan)
+- Fix parameter name when assigning an IP to the specified Domain (#702 by @josephshanak)
+- `Ip::index()` now returns all IPs instead of the shared IPs (#707 by @josephshanak)
+
+### Changed
+
+- Updated examples for Debugging and Hydrator usage (#634 by @tonybolzan and #681 by @Jiia)
+- Updated link to the Mailgun Documentation page (#688 by @Casmo)
+- Remove deprecated Laravel package due to it is archived (#695 by @tomschlick)
+
+### Removed
+
+- Remove method for non-existing Stats URL (#705 by @uavn)
+
 ## 3.0.0
 
 ### Added