add `security.md` (#71)

* add security.md

* add email

update github ci

apply ibc huckleberry patch

v2 upgrade (#65)

* add upgrade handler

* set up upgrade handlers in app.go

* bump module version to v2

* set minimum supported Go version to 1.20

* reverse some unintentional changes

* add a log msg

* add readme to v2 upgrade

* fix a typo

* update readme

* update

* add controller store key to store upgrades

* revert some unintentional changes

* update readme

Apply ibc CW patch (#39)

* use sdk v0.46.8

* apply alpe ibc fix

improve a comment

update required metadata schema

accept extra unknown fields in JSON

format comments

update unit test