laravel 5.8 support

Author: Kent Allan Jay Ando

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.*, 5.8.*, and 6.* .
 
 ## Usage
 

composer.json

@@ -11,13 +11,13 @@
     ],
     "require": {
         "php": "^7.1",
-        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|^6.0",
-        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|^6.0"
+        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|^6.0",
+        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|^6.0"
     },
     "require-dev": {
         "ext-pdo_sqlite": "*",
         "mockery/mockery": "^1.0.0",
-        "orchestra/testbench": "~3.5.0|~3.6.0|^4.0|^5.0",
+        "orchestra/testbench": "~3.5.0|~3.6.0|~3.8.0|^4.0|^5.0",
         "phpunit/phpunit" : "^7.0|^8.0|^9.0"
     },
     "autoload": {