Allow webonyx/graphql-php 14 (#31)

Remove travis php 5.6 and 7.0 build

Remove readme requirements section

Merge pull request #27 from enumag/patch-1

Order generated use statements

Merge pull request #26 from Vincz/master

Make created cache dir mask as option and default to 0777

Merge pull request #23 from mcg-web/allow_graphql-php_0.12

Allow webonyx/graphql-php 0.12

Merge pull request #22 from MarijnKoesen/remove_chmod

Remove chmod as it's giving warnings

Merge pull request #21 from mcg-web/add-prefer-lower

Fix minimal version of graphql-php

Merge pull request #20 from casskir/master

Add description field to custom-scalar type

Merge pull request #18 from mcg-web/tests

Add new modes tests