Update dev-only dependencies to be compatible with PHP 7.1.3 (#22)
Update dev-only dependencies to be compatible with PHP 7.1.3 (#22)

This also fixes broken tests, sorry for missing that earlier.
kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter,kadet1090/KeyLighter