release v1.1.0
* update dependencies
* respect `content-disposition` header (#41)
* `ex_aws` needs to be at least 2.1.2 (#43)
* add attribution to the original work (#39)

Notes

Now, the Waffle respects `content-disposition` header. It means that
for remote uploads by url, we'll check for this header and will
respect the filename from it. In other words, we'll save a file with a
name from `content-disposition` header.