Enable package usage for Laravel v5.8

Author: lukaav

.travis.yml

@@ -1,7 +1,7 @@
 language: php
 
 php:
-  - 7.1
+  - 7.2
 
 env:
   matrix:

README.md

@@ -8,7 +8,7 @@ Adds optimistic locking feature to Eloquent models.
 composer require reshadman/laravel-optimistic-locking
 ```
 
-> This package supports Laravel 5.5.*,  5.6.* and 5.7.* .
+> This package supports Laravel 5.5.*,  5.6.*, 5.7.* and 5.8.*.
 
 ## Usage
 

composer.json

@@ -11,8 +11,8 @@
     ],
     "require": {
         "php": "^7.1",
-        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0",
-        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0"
+        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|~5.8.0",
+        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0"
     },
     "require-dev": {
         "ext-pdo_sqlite": "*",