chore(composer): laravel 7 support added

Author: mitulgolakiya

composer.json

@@ -24,13 +24,13 @@
         }
     ],
     "require": {
-        "php": ">=7.2",
-        "illuminate/support": "^6.0.0",
-        "laracasts/flash": "~3.0"
+        "php": "^7.2.5",
+        "illuminate/support": "^7.0",
+        "laracasts/flash": "^3.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "~5.0",
-        "mockery/mockery": "~0.9"
+        "phpunit/phpunit": "^8.5",
+        "mockery/mockery": "^1.3.1"
     },
     "autoload": {
         "psr-4": {