[Improvement] Clean up memory leaks and memory allocations

[theoludwig]

Proposal

Currently, we use sizeof(char*) and sizeof(char) interchangeably, we should make a diiference as they are not the same thing, and we should allocate as little memory as possible.

Also running the automated tests by compiling with the gcc flag -fsanitize=address, it yields a bunch of errors.

Could be a good practice to run valgrind to check for memory leaks.

YouTube - Jacob Sorber- find memory errors quickly. (-fsanitize, addresssanitizer)

[theoludwig]

🎉 This issue has been resolved in version 3.0.0 🎉

The release is available on GitHub release

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