Dependabot can't resolve your PHP dependency files

[dependabot-preview]

Dependabot can't resolve your PHP dependency files.

As a result, Dependabot couldn't update your dependencies.

The error Dependabot encountered was:

Your requirements could not be resolved to an installable set of packages.
  Problem 1
    - phpunit/phpunit 8.4.x-dev requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.x-dev requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.4 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.3 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.2 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.1 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.3.0 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.5 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.4 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.3 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.2 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.1 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.2.0 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.6 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.5 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.4 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.3 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.2 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.1 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.1.0 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.6 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.5 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.4 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.3 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.2 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.1 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - phpunit/phpunit 8.0.0 requires php ^7.2 -> your PHP version (7.3.8-1+ubuntu18.04.1+deb.sury.org+1) overridden by "config.platform.php" version (7.0) does not satisfy that requirement.
    - Installation request for phpunit/phpunit ^8.0.0 -> satisfiable by phpunit/phpunit[8.0.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.1.0, 8.1.1, 8.1.2, 8.1.3, 8.1.4, 8.1.5, 8.1.6, 8.2.0, 8.2.1, 8.2.2, 8.2.3, 8.2.4, 8.2.5, 8.3.0, 8.3.1, 8.3.2, 8.3.3, 8.3.4, 8.3.x-dev, 8.4.x-dev].

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