Bump new version with latest changes

[artberri]

Please, could you bump a new version (0.3.3 I guess) with the latest changes?

We need you to tag a new version in order to be able to install this library through composer if we have the last Guzzle library version (6.2). You have merged the change 4 moths ago but you didn't release a new version yet:
https://github.com/Microsoft/ApplicationInsights-PHP/pull/14/files

Thank you in advance.

Error logs:

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - microsoft/application-insights 0.3.0 requires guzzlehttp/guzzle ~5.0 -> satisfiable by guzzlehttp/guzzle[5.0.0, 5.0.1, 5.0.2, 5.0.3, 5.1.0, 5.2.0, 5.3.0, 5.3.1, 5.3.x-dev] but these conflict with your requirements or minimum-stability.
    - Installation request for berriart/apm-bundle ~0.0 -> satisfiable by berriart/apm-bundle[v0.0.1].
    - berriart/apm-bundle v0.0.1 requires microsoft/application-insights ~0.3 -> satisfiable by microsoft/application-insights[0.3.0, 0.3.1, 0.3.2].
    - microsoft/application-insights 0.3.1 requires guzzlehttp/guzzle >=5.0 <=6.1.0 -> satisfiable by guzzlehttp/guzzle[6.1.0].
    - microsoft/application-insights 0.3.2 requires guzzlehttp/guzzle >=5.0 <=6.1.0 -> satisfiable by guzzlehttp/guzzle[6.1.0].
    - Conclusion: don't install guzzlehttp/guzzle 6.1.0

[JakubOleksy]

Done. Sorry for the delay.