A way to evict urls from the cache

[Panthro]

Hi

I'm using cache manager for images but for some api calls as well, I load some json that change once a week.

The thing is, there is no way to evict a url from cache manually when I know the data has changed.

If we could have several cache managers, like mentioned in #5 that would do, because I can setup a distinct eviction strategy for these files.

[Panthro]

Btw currently what I'm doing to avoid the cache manager from always caching the api data I'm setting a cachebuster param in the url that is fixed to the week number of the year

[kmorkos]

This would be great for me as well, I have some files that can be updated and I need to be able to clear them from the cache when that happens.

UPDATE: I've created a fork with this functionality and sent in a pull request https://github.com/renefloor/flutter_cache_manager/pull/24

[fhuonder]

We also need this functionality.
A pull request is already available. Please pull it in and make a new release.

[renefloor]

I added the functionality to remove specific urls from the cache in 0.3.0-alpha.2.