Set lowest PHP version requirement to 7.0

[ramsey]

PHP 5.4 is already end-of-life, and 5.5 will EOL on 10 Jul 2016. PHP 5.6 is supported until 31 Dec 2018.

See http://php.net/supported-versions.php

[GrahamCampbell]

👍 for dropping 5.4 asap. I think it might be best to hold off on 5.5 for a few months though. Only a few months though. I still want to see it gone. ;)

[ramsey]

I probably won't release a 4.0.0 until after 10 July, so I think having 5.6 as the lowest supported version will be fine.

[GrahamCampbell]

Great. ;)

[Spomky]

Because PHP 5.6 active support will end by the end of the month and v4.0 has not yet been released, PHP 7.0 could be the minimal requirement for the next major version.
The other benefit is that you can remove the paragonie/random_compat.

[GrahamCampbell]

Because PHP 5.6 active support will end by the end of the month

Not true. Support for php 5.6 has been extended, beyond 7.0 actually.

---

[GrahamCampbell]

Oh, active support, meh, well, security support is all that really matters imo. If there are other bugs that don't affect the library in php 5.6, after that point, that's fine, it doesn't affect the library.

[Potherca]

In issue #186 @ramsey has stated

the next major version of ramsey/uuid will target PHP 7+ only

Shouldn't the title of this issue be changes to "Set lowest PHP version requirement to 7.0"?

[ramsey]

Title changed to use 7.0, given the changes introduced through #189.