Bump guzzle

Merge pull request #27 from ninjaparade/patch-1

Update to support guzzle 7

Historical Events

• Fixed TravisCI issue with PHP and newer versions of PHPUnit
• #23 Add optional timestamp parameter to fireEvent() method

Updates to Guzzle, API and Docs

• Add ability to send events about anonymous users via #11
• Fixed array notation in docs via #13
• Upgrade to Guzzle 6 via #18. Takes care of #14, #15, #16, #17

Updates to Exception handling

Updated Exception handling to type hint for exception with getResponse method, and properly fall back to exception that may not have it.

1.0.2

Fix typo that causes auth error