Bump PHP versions tested by AppVeyor (#1230)
Bump PHP versions tested by AppVeyor (#1230)


jmikola/mongo-php-driver,mongodb-labs/mongo-php-driver-prototype,mongodb-labs/mongo-php-driver-prototype,jmikola/mongo-php-driver,mongodb/mongo-php-driver,mongodb-labs/mongo-php-driver-prototype,jmikola/mongo-php-driver,mongodb/mongo-php-driver,mongodb-labs/mongo-php-driver-prototype,jmikola/mongo-php-driver,mongodb/mongo-php-driver,jmikola/mongo-php-driver,mongodb/mongo-php-driver,mongodb/mongo-php-driver,mongodb-labs/mongo-php-driver-prototype