Darcy/worm 246/improve clarity around $errstr param (#159)

* Update RaygunClient.php

* Update composer.json

* Update composer.json

* Update composer.json

* Update composer.json

* Update SymfonyInstructions.md

* Update UsageExampleV2.md

Version bump/release (#158)

Merge pull request #156 from MindscapeHQ/js/version-bump-and-changelog

Bump version and update changelog

Merge pull request #154 from edsrzf/psr-log-update

Merge pull request #153 from MindscapeHQ/is/update-setuser-comment

Update SetUser method summary

Merge pull request #149 from MindscapeHQ/dm/bump-version-for-2.2.0

Bump version and add changelog entry for 2.2.0 release

Merge pull request #146 from MindscapeHQ/ob/release-provider-update

Release: Updated the version numbers

Merge pull request #144 from MindscapeHQ/dm/bump-version-for-2.1.0

Merge pull request #135 from MindscapeHQ/sh/bump-version-for-release

Bump version to 2.0.2 for release