Gzip Signature

[RvdHout]

https://github.com/adoconnection/SevenZipExtractor/blob/master/SevenZipExtractor/Formats.cs#L106

{SevenZipFormat.GZip, new byte[] { 0x1f, 0x0b }},

according to: https://en.wikipedia.org/wiki/List_of_file_signatures, should be:

{SevenZipFormat.GZip, new byte[] { 0x1f, 0x8b }},

[adoconnection]

hi, thanks!