Merge pull request php-vcr#27 from php-vcr/dependency-update

Updates dependencies.

Author: adri

composer.json

@@ -12,15 +12,15 @@
 
  "require": {
  "ext-curl": "*",
- "guzzle/http": "3.7.*",
- "guzzle/plugin-backoff": "3.7.*",
+ "guzzle/http": "3.8.*",
+ "guzzle/plugin-backoff": "3.8.*",
  "beberlei/assert": "1.*",
  "symfony/yaml": "2.*"
  },
 
  "require-dev": {
  "mikey179/vfsStream": "dev-master",
- "guzzle/plugin-mock": "3.7.*",
+ "guzzle/plugin-mock": "3.8.*",
  "satooshi/php-coveralls": "dev-master",
  "lapistano/proxy-object": "dev-master"
  },