Upgrade to 11: Custom optimizer ignored

[korridor]

I use a custom optimizer and register this optimizer in the config media-library.image_optimizers.
Since the major 11 upgrade, the custom optimizer does not get called at all. If I add logs to the canHandle and getCommand function, nothing happens. If I downgrade, it works again, without changing anything else.

---

I debugged the problem a bit, and it looks to me like the problem is somewhere here:

The laravel-medialibrary only uses the image_optimizers config here to create the OptimizerChainFactory:

laravel-medialibrary/src/Conversions/Conversion.php

Line 40 in 3bb61ae

$optimizerChain = OptimizerChainFactory::create(config('media-library.image_optimizers'));

In the OptimizerChainFactory (https://github.com/spatie/image-optimizer/blob/02e2717c31334646f00a0e25cf5edbf41bd20ac3/src/OptimizerChainFactory.php#L15) the $config is being used, but it ignores custom optimizers, since the optimizers are redefined here. (https://github.com/spatie/image-optimizer/blob/02e2717c31334646f00a0e25cf5edbf41bd20ac3/src/OptimizerChainFactory.php#L35)

[patinthehat]

@korridor We'd be happy to accept a PR that fixes this! 👍

[timvandijck]

A PR with just a failing test would be welcome too (sounds like a good first issue).

[0xb4lint]

I've made a PR for this issue: spatie/image-optimizer#216

[timvandijck]

I just merged and published the PR, thank you!