* tweak Readme with AI suggestions!

needs to be v2 apparently

fix: support string tag opt

fixes #36

go fmt

Fix slice regression caused by #32

Slices that are nil are empty and valid.
The change introduced by #32 which fixes #31 has changed how
nil slices are marshaled (`null` instead of `[]`).

Fix this regression by removing slices from the check.

chore: use github actions

replaces travis-ci

allow serialization of field having no group tag (#29)

fix: Handle empty interface when marshalling (#26)

Co-authored-by: Canh Nguyen <[email protected]>

fix map key string conversation panic by string alia type (#22)

* fix map key string conversation panic by string alia type

* add test case for alia string type conversation

switch to go modules