How can I save width and height of images uploaded with CarrieWave?

[tmhr94]

Hi, there.
Thanks for reading.

I've upgraded the gem's version from 4.2.4 to 5.1.1.
After upgraded, I found an error undefined method 'extract_dimensions' so I've changed the method to extract_size that solves the error.
But I also found an unexpected stuff that is width and height of images uploaded with CarrieWave not saved.

I know this is due to a breaking change at e220fc4 .

How can I find another way to save width and height without using extract_dimensions?
I'd appreciate it if you could tell me about it.

[tmhr94]

@galetahub
Sorry for the sudden mention to you.
I couldn't understand why you have done a commit below.
Is there any problem with this codes??
If you can explain about it, would you please tell me reasons?

e220fc4