Update test bootstrap for newer Composer.
Update test bootstrap for newer Composer.
lvht/psysh,adetch/psysh,bobthecow/psysh,lvht/psysh,bobthecow/psysh,mubassirhayat/psysh,damiankloip/psysh,barryvdh/psysh,damiankloip/psysh,damiankloip/psysh,adetch/psysh,mubassirhayat/psysh,barryvdh/psysh