Semantic versioning

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All UTL libraries follow semantic versioning, which is defined by 3 numbers MAJOR.MINOR.PATCH:

1. MAJOR — version that makes incompatible API changes
2. MINOR — version that adds functionality in a backwards compatible manner
3. PATCH — version that contains backwards compatible chores & bug fixes

The version is defined at the top of each header with the following format:

#define UTL_<module_name>_VERSION_MAJOR <major_integer>
#define UTL_<module_name>_VERSION_MINOR <minor_integer>
#define UTL_<module_name>_VERSION_PATCH <patch_integer>