Merge pull request php-vcr#323 from php-vcr/1.5-updating-vfsstream

Updated vfsstream

Author: JeroenVanOort

composer.json

@@ -27,7 +27,7 @@
 
  "require-dev": {
  "phpunit/phpunit": "^7.4.3",
- "mikey179/vfsstream": "^1.2",
+ "mikey179/vfsstream": "^1.6",
  "phpstan/phpstan": "^0.12",
  "phpstan/phpstan-beberlei-assert": "^0.12.0",
  "thecodingmachine/phpstan-strict-rules": "^0.12",