v1.0.4

What's Changed

• added makefile by @neo7337 in #11
• Upgrade go.mod by @plutov in #12
• changing validator function parameter to support a Field object by @vitorestevam in #17
• Updated contraints and validation checks by @neo7337 in #18
• readme update by @neo7337 in #19
• Adding more descriptive error messages by @vitorestevam in #20

Thanks to our New Contributors

• @plutov made their first contribution in #12
• @vitorestevam made their first contribution in #17