Wellmap

Feature
* Add hyphen range syntax ([`eaf2c73`](https://github.com/kalekundert/wellmap/commit/eaf2c73520881bda7b28ea495bcc044d8b7fad88))

Fix
* Don't drop nans too aggressively ([`a001c8f`](https://github.com/kalekundert/wellmap/commit/a001c8f297d85b5ca5986d8569c29197f9d4bc34))

Feature
* Allow `show(attrs=...)` to be a string ([`0572a61`](https://github.com/kalekundert/wellmap/commit/0572a610de3e1559e4029e0bb7c505e2a07d7ae9))

Fix
* Correct color concave well groups ([`04015bf`](https://github.com/kalekundert/wellmap/commit/04015bf5d76377ccb53eabd5f0a0393137f267de))

Feature
* Pick colors based on well coordinates ([`90a25a1`](https://github.com/kalekundert/wellmap/commit/90a25a17455b2b53d973b7a3e867be9943b32bdd))

Fix
* Better error checking ([`eea82a3`](https://github.com/kalekundert/wellmap/commit/eea82a394ae20789731d0068ce096f7cfb6a483d))