10.0.0: Drop PHP 5 support

thekid released this 10 Apr 19:31

· 54 commits to master since this release

Implemented xp-framework/rfc#334: Drop PHP 5.6:
. Heads up: Minimum required PHP version now is PHP 7.0.0
. Rewrote code base, grouping use statements
. Converted newinstance to anonymous classes
. Rewrote isset(X) ? X : default to X ?? default
(@thekid)

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