1. PHP REQUIREMENT LINK : https://github.com/flatpressblog/flatpress
2. We offer incremental upgrade i.e for example 1.1 to 1.2 but not from previous versions to 1.2 as vendor provides upgrade zip for upgrading incremental versions. change minimum required version in <min_require> tag in info.xml and make relevant changes in upgrade.php in every update. Download upgrade package from here https://www.flatpress.org/download