doctrine/inflector v1.3.0 requires php ^7.1 -> your PHP version (7.0.0) does not satisfy that requirement.` and i can't update php version

i got error doctrine/inflector v1.3.0 requires php ^7.1 -> your PHP version (7.0.0) does not satisfy that requirement. and i can not update php version how to solve it

via Chebli Mohamed