0.9.0

What's Changed

• improved implementation of get column ordinal by @runeanielsen in #52
• fixes issue where HasColumnChanged didn't work correctly by @runeanielsen in #53
• removes is bit set since it is not useful on its own by @runeanielsen in #54
• fixes issue with dbnull returned instead of null value by @runeanielsen in #55
• adds comment about update mask being not null on specific case by @runeanielsen in #56

Full Changelog: 0.8.0...0.9.0