Update Laravel version for 5.8 release

DCzajkowski · web-flow · commit b84cd83a494f · 2019-02-26T22:26:19.000+01:00
diff --git a/composer.json b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "laravel/framework": "~5.7.14"
+        "laravel/framework": "~5.8"
     },
     "extra": {
         "laravel": {
