reader: unzip and untar data without checking the filename
reader: unzip and untar data without checking the filename

Since filename can be also an URL, it's more wise to make decision based
on data and not the filename.

This commit will try to unzip and untar the data, and if it fails it
will pass the data down the pipe.

Signed-off-by: Sławomir Stępień <837631c17ee79fedca43bfe4b9b5c80000c354f7@poczta.fm>

elixir-geolix/adapter_mmdb2,elixir-geolix/adapter_mmdb2