bump phpunit from 4 to 8

# Conflicts:
#	composer.json

composer.json

@@ -31,8 +31,7 @@
         "php": "^7.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8",
-        "cweagans/composer-patches": "^1.6"
+        "phpunit/phpunit": "^8.0"
     },
     "suggest": {
         "ext-phpiredis": "Allows faster serialization and deserialization of the Redis protocol",
@@ -42,17 +41,5 @@
         "psr-4": {
             "Predis\\": "src/"
         }
-    },
-    "extra": {
- 		"composer-exit-on-patch-failure": true,
- 		"patches": {
- 			"phpunit/phpunit-mock-objects": {
- 				"Fix PHP 7 and 8 compatibility": "./tests/phpunit_mock_objects.patch"
- 			},
- 			"phpunit/phpunit": {
- 				"Fix PHP 7 compatibility": "./tests/phpunit_php7.patch",
- 				"Fix PHP 8 compatibility": "./tests/phpunit_php8.patch"
- 			}
- 		}
- 	}
+    }
 }