All Themyscira GSM codec libraries (currently libgsmefr, libgsmfr2, libgsmhr1
and libtwamr) use Semantic Versioning, as described at <https://semver.org/>.
In the present source release package, the semantic versions of the included
libraries are as follows:

libgsmefr version 1.2.0
libgsmfr2 version 2.1.0
libgsmhr1 version 1.0.0
libtwamr  version 1.0.0
