Use PHP_CS_FIXER_FUTURE_MODE (#505)

Author: kubawerlos

.github/workflows/ci.yaml

@@ -46,6 +46,9 @@ jobs:
 
  runs-on: ${{ matrix.os }}
 
+ env:
+ PHP_CS_FIXER_FUTURE_MODE: 1
+
  steps:
  - name: Checkout
  uses: actions/checkout@v2

src/Fixer/OperatorLinebreakFixer.php

@@ -47,7 +47,7 @@ public function getConfigurationDefinition(): FixerConfigurationResolverInterfac
  */
  public function configure(?array $configuration = null): void
  {
- $this->fixer->configure($configuration);
+ $this->fixer->configure($configuration ?? []);
  }
 
  public function getPriority(): int