Drop support for CiviCRM versions supporting PHP < 7.2

[jensschuppe]

... which is, according to the docs, versions lower than 5.14.

We might want to go further and drop support for CiviCRM versions supporting PHP < 7.1 since the current ESR release is already marked incompatible with PHP 7.0

@bjendres thoughts?

[bjendres]

@jensschuppe Is there a specific reason for it?

[bjendres]

Also, maybe we should schedule this for the next version (1.9)?

[jensschuppe]

Reason being to be able to adopt PHP 7 language constructs. Pushing to 1.9 seems ok to me, since it'd be an API break.

However, discussing whether to support EOL PHP 7 versions, seems appropriate to me. The latest CiviCRM ESR release is incompatible with PHP 7.0 already.

[jensschuppe]

3115564 drops support for CiviCRM Core versions supporting PHP < 7.2, so at least CiviCRM Core 5.35.0 is required. Dropping support for PHP 7.2 (by requiring CiviCRM Core 5.58) would introduce an incompatibility with the current ESR, which is 5.51.