Update requirements.txt, make timm version flexible

[bonlime]

I'm running into troubles trying to add this package as requirement using poetry, since some of other packages in my lib require higher versions of timm. I tested that your library works with higher versions of timm library

@dxli94 review please

[tyler-romero]

I also would like for the timm version to be flexible (or up to date, timm just released a v0.9)

[danieltudosiu]

@bonlime With what versions of timm is lavis compatible from your experience?

[bonlime]

@danieltudosiu For me it works with 0.6.13

[xinyiliu128]

any plans to merge this pr? I also want to work with a higher version of timm package.

[bonlime]

@dxli94 Hey, could you please review this?

[siddk]

Bumping this - is there a reason to pin timm to 0.4.12?