Merge branch 'release/v0.1.5'
Merge branch 'release/v0.1.6'
Merge branch 'release/v0.1.7'
Merge branch 'release/v0.1.8'
 bump version
Merge branch 'release/v0.1.9'
Merge tag 'v0.1.9' into develop

Release v0.1.9
--------------

1. Improved document handling
2. Fixed memory leaks
3. Added classes reflections
4. Added data-types (useful to make reflections easy to consume)
5. @Date and @Boolean support
6. Added flexible validator (`crodas/validator`)