upgrade for duckdb v1.2.1 (#143)

Upgrade to DuckDB v1.2.0 (#142)

Upgrade to h3 v4.2.0 (#139)

* upgrade to h3 v4.2.0

* add experimental functions

* round

* upgrade ci tools

* upgrade artifact download

* test

* fix test

upgrade to v1.1.1 (#132)

* upgrade to v1.1.1

* update ci script

* revert a CI change

upgrade to v1.1.0 (#121)

* upgrade to main

* upgrade to main again

* update

* register ext

* incorporate version number

* update

* update to latest

* update for v1.1.0

* extension ci tools release

upgrade to v1.0.0 (#107)

fix CI for wasm (#104)

use extension-upload-single.sh per @carlopi (#101)

fix duckdb version in CI

Update README.md (#97)

Thanks @marklit for suggesting adding some headers