[Blog] Add v4.3 release notes

docs/blog/version-4.3-release-notes.md

@@ -0,0 +1,58 @@
+---
+title: Version 4.3 release notes
+author: Loïc Poullain
+author_title: Creator of FoalTS. Software engineer.
+author_url: https://loicpoullain.com
+author_image_url: https://avatars1.githubusercontent.com/u/13604533?v=4
+image: blog/twitter-banners/version-4.3-release-notes.png
+tags: [release]
+---
+
+![Banner](./assets/version-4.3-is-here/banner.png)
+
+Version 4.3 of [Foal](https://foalts.org/) is out!
+
+<!--truncate-->
+
+## Better CLI ouput when script arguments are invalid
+
+Previously, when executing `foal run my-script` with invalid arguments, the CLI would only display one error at a time.
+
+For example, with the following schema and arguments, we would only get this error message:
+
+```typescript
+export const schema = {
+  type: 'object', 
+  properties: {
+    email: { type: 'string', format: 'email', maxLength: 2 },
+    password: { type: 'string' },
+    n: { type: 'number', maximum: 10 }
+  },
+  required: ['password']
+};
+```
+
+```bash
+foal run my-script email=bar n=11
+```
+
+```
+Error: The command line arguments must match format "email".
+```
+
+From version 4.3 onwards, the CLI logs all validation errors and with a more meaningful description.
+
+```
+Script error: arguments must have required property 'password'.
+Script error: the value of "email" must NOT have more than 2 characters.
+Script error: the value of "email" must match format "email".
+Script error: the value of "n" must be <= 10.
+```
+
+## [Fix] the logger no longer throws an error in development when the client request is interrupted
+
+Using the logger's `dev` format, Foal would occasionally throw the error `TypeError: Cannot read properties of null`.
+
+This would occur when the connection with the client was lost, which happens, for example, when the React client server hotly reloads.
+
+This version fixes this error.