Merge branch '7.x'

Author: GrahamCampbell

.github/workflows/tests.yml

@@ -40,7 +40,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.composer/cache/files
-          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+          key: dependencies-php-${{ matrix.php }}-${{ matrix.stability }}-composer-${{ hashFiles('composer.json') }}
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2

tests/Support/SupportCollectionTest.php

@@ -421,10 +421,13 @@ public function testForgetSingleKey()
         $c = new Collection(['foo', 'bar']);
         $c = $c->forget(0)->all();
         $this->assertFalse(isset($c['foo']));
+        $this->assertFalse(isset($c[0]));
+        $this->assertTrue(isset($c[1]));
 
         $c = new Collection(['foo' => 'bar', 'baz' => 'qux']);
         $c = $c->forget('foo')->all();
         $this->assertFalse(isset($c['foo']));
+        $this->assertTrue(isset($c['baz']));
     }
 
     public function testForgetArrayOfKeys()