Update CHANGELOG for v5.11.2

Signed-off-by: Florian Hotze <[email protected]>

Author: florian-h05

CHANGELOG.md

@@ -11,6 +11,18 @@
 | Bugfix      | `items`       | Item: Declare null as allowed value for `sendCommand`, `postUpdate`               | [#452](https://github.com/openhab/openhab-js/pull/452) | no       |
 | Enhancement | `Quantity`    | Export Quantity class type definition                                             | [#454](https://github.com/openhab/openhab-js/pull/454) | no       |
 
+Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone/43).
+
+## 5.11.2
+
+| Type        | Namespace     | Description                                                                       | Reference                                              | Breaking |
+|-------------|---------------|-----------------------------------------------------------------------------------|--------------------------------------------------------|----------|
+| Bugfix      | `items`       | Fix `NULL` Item state (UnDefType) not recognized as `null`                        | [#448](https://github.com/openhab/openhab-js/pull/448) | no       |
+| Bugfix      | `Quantity`    | Fix `.unit` returns null if there is a valid unit                                 | [#449](https://github.com/openhab/openhab-js/pull/449) | no       |
+| Bugfix      | `items`       | Item: Declare null as allowed value for `sendCommand`, `postUpdate`               | [#452](https://github.com/openhab/openhab-js/pull/452) | no       |
+
+Also see [`v5.11.1...v5.11.2`](https://github.com/openhab/openhab-js/compare/v5.11.1...v5.11.2).
+
 ## 5.11.1 (5.11.0)
 
 | Type        | Namespace | Description                                                                        | Reference                                              | Breaking |
@@ -275,6 +287,7 @@ Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone
 
 Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone/19).
 
+
 ## 4.5.1
 
 | Type   | Namespace      | Description                                                 | Reference                                              | Breaking |
@@ -434,6 +447,7 @@ Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone
 | Docs   |           | Update timer docs                               | [#161](https://github.com/openhab/openhab-js/pull/161) | No       |
 | Bugfix | `actions` | Fix `get()`, `thingActions()` & dynamic exports | [#165](https://github.com/openhab/openhab-js/pull/165) | No       |
 
+
 Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone/5).
 
 ## 2.0.3
@@ -444,6 +458,7 @@ Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone
 | Enhancement | `items`    | ItemHistory: Add missing methods & Enable type defs                      | [#158](https://github.com/openhab/openhab-js/pull/158) | No       |
 | Docs        | `actions`  | Update docs for naming timers                                            | [#160](https://github.com/openhab/openhab-js/pull/160) | No       |
 
+
 Also see the [Release Milestone](https://github.com/openhab/openhab-js/milestone/4).
 
 ## 2.0.2

README.md

@@ -18,7 +18,6 @@ This library is included by default in the openHAB [JavaScript Scripting add-on]
   - [Adding Actions](#adding-actions)
   - [UI Event Object](#ui-event-object)
 - [Scripting Basics](#scripting-basics)
-  - [`let` and `const`](#let-and-const)
   - [`require`](#require)
   - [`console`](#console)
   - [Timers](#timers)