Improve func__deflate() & func__inflate()

[a740g]

This PR does the following:

• Optimizes func__deflate() & func__inflate() to eliminate unnecessary buffer copies. This results in a nice speed boost of upto 15% in some cases on my Ryzen 5600
• Removes all unsafe usage of malloc() and free()
• Handles a case where the user can pass negative values for originalSize which can potentially break qbs
• Delegates the linking responsibility to the linker. This makes it possible to use the library from elsewhere with ease [needed for an upcoming PR]