fix(dynamiclib): invalid function pointer to data pointer conversion #24
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When compiling ltreesitter on Windows with all the warnings enabled (based on the Makefile), the line with GetProcAddress throws an error. This is because it actually returns a FARPROC (a function pointer type) and the function returns a void pointer (a data pointer type), and such conversion are illegal in ISO C. POSIX implicitly guarantees this.
This PR instead use double casting to return a void pointer. This isn't beautiful, but it tricks the compiler to thinking that it's valid ISO C.