chore: update plugin php min version to 7.4

[theodesp]

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Description

Faustwp: Set php min version to v7.4

Related Issue(s):

#2022

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Latest commit: 9e7d69a

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[whoami-pwd]

I would love to suggest to have only one place for specifying the min php version - in plugin's header. That will allow us to edit min php version only once, and move the functionality into a standalone class in future. We can use get_plugins or get_file_data or get_plugins_data... But I am not sure how relevant it is now, maybe a good thing to keep in mind for future