Zlib update

Merge pull request #61 from symmetryinvestments/update_zlib

This PR updates zlib to the current version

cmake update

thank you @kinke

Fixes double close issue

Merge pull request #59 from symmetryinvestments/issue58

Fixes #58 simple form of a double close/free

another windows build change

Merge pull request #57 from symmetryinvestments/travis_to_gitlab

Travis to gitlab

Use system zlib library

Merge pull request #55 from kinke/no_zlib

Windows: Don't build & link zlib

fixes unreachable statement in Date handling

v3.2.1

unreachable statement

win32 support

Merge pull request #54 from White-116/support-win32

Added support for the win32 architecture

Update of libxlsxwriter

Merge pull request #52 from burner/master

libxlsxwriter update

do not use this release

v3.1.10

Fix #49

Fix #45

v3.1.9

Fix #49