[Docs] Update changelog and bump version

Author: lindyhopchris

CHANGELOG.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file. This project adheres to
 [Semantic Versioning](http://semver.org/) and [this changelog format](http://keepachangelog.com/).
 
-## 2.x
+## [2.0.0-beta.1] - 2020-03-04
 
 ### Added
 - [#348](https://github.com/cloudcreativity/laravel-json-api/issues/348)

README.md

@@ -62,7 +62,7 @@ A demo application is available at [here](https://github.com/cloudcreativity/dem
 
 | Laravel | This Package |
 | --- | --- |
-| `^7.0` | `^2.0` |
+| `^7.0` | `2.0.0-beta.1` |
 | `^6.0` | `^1.0` |
 | `5.8.*` | `^1.0` |
 | `5.7.*` | `^1.0` |

composer.json

@@ -77,7 +77,7 @@
             }
         }
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "stable",
     "prefer-stable": true,
     "config": {
         "sort-packages": true