Add trimmed_non_empy_string type

Please see change log.

v2.0.0

Added is and assert function and removed unnecessary handy types. See the change log.

Add "nullish" type

Add nullish type

Also fixed type annotation for "empty_string"

Add alias "num" for "number"

Add alias "num" and update README

Added clarification for "even" and "odd" types in README

Added primitive integer types

https://github.com/h-sifat/handy-types/blob/main/CHANGELOG.md#102

Initial Release

v1.0.0

Make package.json ready for publishing