composer install 遇到问题 Problem 1 - phpunit/phpunit 5.7.5 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.

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alt="" />

$ composer install
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - phpunit/phpunit 5.7.5 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - phpunit/phpunit 5.7.4 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - phpunit/phpunit 5.7.3 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - phpunit/phpunit 5.7.2 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - phpunit/phpunit 5.7.1 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - phpunit/phpunit 5.7.0 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3
0) does not satisfy that requirement.
    - Installation request for phpunit/phpunit ^5.7 -> satisfiable by phpunit/ph
punit[5.7.0, 5.7.1, 5.7.2, 5.7.3, 5.7.4, 5.7.5].