remove PHP 5.5 and 5.4 from travis-ci due to build errors. pcc should still be compatible, but travis-ci seems to go with PHP's end-of-life cycle.
remove PHP 5.5 and 5.4 from travis-ci due to build errors. pcc should still be compatible, but travis-ci seems to go with PHP's end-of-life cycle.

sektioneins/pcc