Add require for minimum php 5.5 version

IsraelOrtuno / pipedrive

Complete Pipedrive API client for PHP

MIT License

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Closed egorovpavel closed 7 years ago

egorovpavel commented 7 years ago

specify minimum required php version, because of use of []

IsraelOrtuno commented 7 years ago

How important do you consider this? Guzzle 4 requires php > 5.4