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Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=7.3 but your php version (7.2.34) does not satisfy that requirement. Problem 2 - Root composer.json requires phpunit/php-code-coverage ^9.2.28 -> satisfiable by phpunit/php-code-coverage[9.2.28, 9.2.29]. - phpunit/php-code-coverage[9.2.28, ..., 9.2.29] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 3 - Root composer.json requires phpunit/php-file-iterator ^3.0.5 -> satisfiable by phpunit/php-file-iterator[3.0.5, 3.0.6]. - phpunit/php-file-iterator[3.0.5, ..., 3.0.6] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 4 - Root composer.json requires phpunit/php-invoker ^3.1.1 -> satisfiable by phpunit/php-invoker[3.1.1]. - phpunit/php-invoker 3.1.1 requires php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 5 - Root composer.json requires phpunit/php-text-template ^2.0.3 -> satisfiable by phpunit/php-text-template[2.0.3, 2.0.4]. - phpunit/php-text-template[2.0.3, ..., 2.0.4] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 6 - Root composer.json requires phpunit/php-timer ^5.0.2 -> satisfiable by phpunit/php-timer[5.0.2, 5.0.3]. - phpunit/php-timer[5.0.2, ..., 5.0.3] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 7 - Root composer.json requires sebastian/cli-parser ^1.0.1 -> satisfiable by sebastian/cli-parser[1.0.1]. - sebastian/cli-parser 1.0.1 requires php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 8 - Root composer.json requires sebastian/code-unit ^1.0.6 -> satisfiable by sebastian/code-unit[1.0.6, 1.0.7, 1.0.8]. - sebastian/code-unit[1.0.6, ..., 1.0.8] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 9 - Root composer.json requires sebastian/comparator ^4.0.8 -> satisfiable by sebastian/comparator[4.0.8]. - sebastian/comparator 4.0.8 requires php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 10 - Root composer.json requires sebastian/diff ^4.0.3 -> satisfiable by sebastian/diff[4.0.3, 4.0.4, 4.0.5]. - sebastian/diff[4.0.3, ..., 4.0.5] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 11 - Root composer.json requires sebastian/environment ^5.1.3 -> satisfiable by sebastian/environment[5.1.3, 5.1.4, 5.1.5]. - sebastian/environment[5.1.3, ..., 5.1.5] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 12 - Root composer.json requires sebastian/exporter ^4.0.5 -> satisfiable by sebastian/exporter[4.0.5]. - sebastian/exporter 4.0.5 requires php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 13 - Root composer.json requires sebastian/global-state ^5.0.1 -> satisfiable by sebastian/global-state[5.0.1, ..., 5.0.6]. - sebastian/global-state[5.0.1, ..., 5.0.6] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 14 - Root composer.json requires sebastian/object-enumerator ^4.0.3 -> satisfiable by sebastian/object-enumerator[4.0.3, 4.0.4]. - sebastian/object-enumerator[4.0.3, ..., 4.0.4] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 15 - Root composer.json requires sebastian/resource-operations ^3.0.3 -> satisfiable by sebastian/resource-operations[3.0.3]. - sebastian/resource-operations 3.0.3 requires php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 16 - Root composer.json requires sebastian/type ^3.2 -> satisfiable by sebastian/type[3.2.0, 3.2.1]. - sebastian/type[3.2.0, ..., 3.2.1] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. Problem 17 - Root composer.json requires sebastian/version ^3.0.2 -