Update version to 0.3.18 

Update version to 0.3.17 

Merge pull request OpenMathLib#3304 from xianyi/develop Merge develop int0 0.3.0 for release 0.3.16

Update version to 0.3.15 

Merge pull request OpenMathLib#3150 from xianyi/develop Update branch from develop for 0.3.14 release

Merge pull request OpenMathLib#3033 from xianyi/develop Update branch from develop to release 0.3.13

Fix typos 

Merge pull request OpenMathLib#2907 from xianyi/develop Update from develop for 0.3.11

Merge pull request OpenMathLib#2667 from xianyi/develop Merge develop into 0.3.0 for 0.3.10 release

Version 0.3.9