Update version to 0.3.30

set version to 0.3.29

Merge pull request #4854 from OpenMathLib/develop

merge develop in preparation of the 0.3.28 release

Update version to 0.3.27

Update Makefile.rule

Merge pull request #4316 from OpenMathLib/develop

Merge develop into release-0.3.0 for 0.3.25

Update version to 0.3.24

Increment version to 0.3.23

Merge branch 'develop' into release-0.3.0

Update version to 0.3.21