Update header includes to be compatible with 7-zip 19.00

[BinToss]

The 7-zip source code releases contain four root folders. Asm, C, CPP, and DOC.

Almost all includes are resolved when linking to the C source files, but those files are lacking 7zIn.h.
That file is located in the CPP directory structure at ./CPP/7zip/Archive/7z/7zIn.h

[BinToss]

7-zip source code

Binary Releases
https://www.7-zip.org/
Table 1 = Stable release
Table 2 = Alpha/Beta release
Choose the .exe that matches your CPU architecture