Add composer normalize

Author: sagikazarmark

composer.json

@@ -27,7 +27,7 @@
  "ext-zlib": "*",
  "akeneo/phpspec-skip-example-extension": "^1.0",
  "coduo/phpspec-data-provider-extension": "^1.0",
- "ergebnis/composer-normalize": "^2.1.1",
+ "ergebnis/composer-normalize": "^2.1",
  "guzzlehttp/psr7": "^1.0",
  "henrikbjorn/phpspec-code-coverage": "^1.0",
  "phpspec/phpspec": "^2.4",