1.3.0

Full Changelog: 1.2.0...1.3.0

• IsDirVPK and HeaderSize properties are now public.
• Use the original file name when opening file stream.
• Optimized ReadEntries to be faster and allocate less.

Test on Dota 2's pak01_dir.vpk on Ryzen 3700x:

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
Old	1,106.5 ms	21.83 ms	31.31 ms	112000	30000	4000	877 MB
New	217.7 ms	4.11 ms	4.57 ms	7666	4333	1333	59 MB