test(travis): disable php 7.1
test(travis): disable php 7.1

composer install --prefer-source --no-interaction
/home/travis/build.sh: line 57:  5907 Segmentation fault      (core dumped) composer install --prefer-source --no-interaction
The command "composer install --prefer-source --no-interaction" failed and exited with 139 during .

phwoolcon/phwoolcon,phwoolcon/phwoolcon,phwoolcon/phwoolcon,phwoolcon/phwoolcon