Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit 8.5.38 -> satisfiable by phpunit/phpunit[8.5.38]. - phpunit/phpunit 8.5.38 requires php >=7.2 -> your php version (7.1.33) does not satisfy that requirement. Problem 2 - phpunit/phpunit 8.5.38 requires php >=7.2 -> your php version (7.1.33) does not satisfy that requirement. - yoast/phpunit-polyfills 2.0.0 requires phpunit/phpunit ^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0 -> satisfiable by phpunit/phpunit[8.5.38]. - Root composer.json requires yoast/phpunit-polyfills 2.0.0 -> satisfiable by yoast/phpunit-polyfills[2.0.0].

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit 8.5.38 -> satisfiable by phpunit/phpunit[8.5.38]. - phpunit/phpunit 8.5.38 requires php >=7.2 -> your php version (7.0.33) does not satisfy that requirement. Problem 2 - phpunit/phpunit 8.5.38 requires php >=7.2 -> your php version (7.0.33) does not satisfy that requirement. - yoast/phpunit-polyfills 2.0.0 requires phpunit/phpunit ^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0 -> satisfiable by phpunit/phpunit[8.5.38]. - Root composer.json requires yoast/phpunit-polyfills 2.0.0 -> satisfiable by yoast/phpunit-polyfills[2.0.0].

Process completed with exit code 2.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.