Moved the code to Parsica\Parsica namespace

As part of the move to the parsica-php organisation, we decided to move the namespace to Parsica. Sorry if this would break your integration with Parsica! We did a minor version update because we don't want to go to a v1.x yet, but want to let you know that there has been a backwards compatibility break.

Fix your composer.json file and make sure you use the correct namespace in your code!