Remove `'x-amz-acl': 'public-read'` header (#178)
Remove `'x-amz-acl': 'public-read'` header (#178)

Codecov recently did some fundamental storage changes on its backend in an effort to greatly improve the reliability of our underlying storage systems. As a result the `X-Amz-Acl: public-read` header is no longer needed, and may result in 400 errors if used. 

You can see a similar fix in codecov-python that removes that header here: https://github.com/codecov/codecov-python/pull/253/files
codecov/codecov-node