Fixed PHPUnit.

Author: limingxinleo

composer.json

@@ -23,7 +23,7 @@
     "psr/simple-cache": "^1.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^7.0"
+    "phpunit/phpunit": "^9.0"
   },
   "license": "MIT",
   "authors": [

tests/Unit/Cache/ArrayCacheTest.php

@@ -11,7 +11,7 @@ class ArrayCacheTest extends BaseTest
 {
     private $arrayCache;
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
         $this->arrayCache = new ArrayCache();
@@ -108,4 +108,4 @@ public function shouldHas(): void
         $this->arrayCache->set('foo', 'bar');
         self::assertTrue($this->arrayCache->has('foo'));
     }
-}
+}

tests/Unit/Gtid/GtidCollectionTest.php

@@ -22,7 +22,7 @@ class GtidCollectionTest extends BaseTest
     /**
      * @throws GtidException
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -55,4 +55,4 @@ public function shouldCreateCollection()
     {
         $this->assertInstanceOf(GtidCollection::class, GtidCollection::makeCollectionFromString('9b1c8d18-2a76-11e5-a26b-000c2976f3f3:1-177592'));
     }
-}
+}

tests/Unit/Repository/MySQLRepositoryTest.php

@@ -26,7 +26,7 @@ class MySQLRepositoryTest extends BaseTest
      */
     private $connection;
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -125,4 +125,4 @@ public function shouldReconnect(): void
         $this->mySQLRepositoryTest->isCheckSum();
         self::assertTrue(true);
     }
-}
+}