v4.9.2

• Add more tests for some types 1e93acc
• Merge pull request #259 from vktrl/master 3044fce
• add null test for node be1e549
• fix undefined check, add null test for browser d510305
• Merge pull request #257 from fullstack-build/development 6ab687e
• Fix docs, fix #256 c24f7e1

v4.9.1...v4.9.2