getVersion
Returns human-readable version of the semantic version in format: <major>.<minor>.<patch>[-<type>][.<release_number>], e.g. 1.2.3-rc.4. or 1.0.0. The release number is optional and present only for non-normal releases.
Return
The version string or null if the semantic version is not set.
See also
Throws
if the semantic version is invalid.