Tgz encoding

dist.ini fix for:

```
Could not decode UTF-8 t/specs/content.tgz; encoded_content set by
@Basic/GatherDir (Dist::Zilla::Plugin::GatherDir line 165);
error was: utf8 "\x8B" does not map to Unicode
at xxxxxx/lib/5.16.3/x86_64-linux/Encode.pm line 176.
```