Add ext- requirements to composer.json

[misakstvanu]

Having extensions listed in documentation is cool, having them in composer is even cooler. Added bcmath, gmp, json to composer.json.

[matthewelwell]

Does JSON need adding here since it wasn't in the original documentation?

[misakstvanu]

The package uses json_encode and json_decode, so I added it also.
That said, since PHP8.0, json extension is always installed and it is not really necessary since.

[matthewelwell]

Ah, ok, yeah. In fact, I just removed PHP7 from the test matrix here, so I think we can probably remove JSON from this list.

[misakstvanu]

Fair, sorry about that.

[matthewelwell]

@misakstvanu can you fix the conflicts and I can get this merged?

[misakstvanu]

Done

[VincentLanglet]

Hi @matthewelwell,

There is something weird with the "4.5.0 release" with this PR.
The tag is available here: https://github.com/Flagsmith/flagsmith-php-client/releases/tag/v4.5.0
But not on packagist https://packagist.org/packages/flagsmith/flagsmith-php-client

So we cannot install the 4.5.0 version of flagsmith.

[matthewelwell]

Sorry @VincentLanglet , I believe that's because we hadn't updated the version number in composer.json 🤦

I have a PR open to do that now (here), and I will recreate the tag as soon as I can. Apologies.

[matthewelwell]

@VincentLanglet this is now resolved.