Relax version restrictions and bump xarray

Closes #51

Allow `xarray >=0.18,<1`. Also just require `^0` for non-critical packages that aren't 1.0 yet.

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.2.1 (2021-05-07)
+Support [xarray 0.18](http://xarray.pydata.org/en/stable/whats-new.html#v0-18-0-6-may-2021) and beyond, as well as looser version requirements for some other dependencies.
+
 ## 0.2.0 (2021-05-05)
 Call [`stackstac.show`](https://stackstac.readthedocs.io/en/latest/api/main/stackstac.show.html) to render DataArrays in interactive ipyleaflet maps in your notebook! See [this example](https://stackstac.readthedocs.io/en/latest/examples/show.html) for more.
 

pyproject.toml

@@ -14,12 +14,12 @@ Pillow = {version = "^8.1.2", optional = true}
 Sphinx = {version = "^3.5.4", optional = true}
 aiohttp = {version = "^3.7.4", optional = true}
 cachetools = {version = "^4.2.2", optional = true}
-coiled = {version = "^0.0.39.1", optional = true}
+coiled = {version = "^0", optional = true}
 dask = {extras = ["array"], version = "^2021.4.1"}
 dask-labextension = {version = "^5.0.1", optional = true}
 distributed = {version = "^2021.4.1", optional = true}
 furo = {version = "^2021.4.11-beta.34", optional = true}
-geogif = {version = "^0.1.0", optional = true}
+geogif = {version = "^0", optional = true}
 ipyleaflet = {version = "^0.13.6", optional = true}
 ipython = {version = "^7.20.0", optional = true}
 ipywidgets = {version = "^7.6.3", optional = true}
@@ -32,15 +32,15 @@ nbsphinx = {version = "^0.8.2", optional = true}
 numpy = "^1.20.0"
 numpydoc = {version = "^1.1.0", optional = true}
 pandoc = {version = "^1.0.2", optional = true}
-planetary-computer = {version = "^0.1.0", optional = true}
+planetary-computer = {version = "^0", optional = true}
 pyproj = "^3.0.0"
-pystac-client = {version = "^0.1.1", optional = true}
+pystac-client = {version = "^0", optional = true}
 python = "^3.8"
 rasterio = "^1.2.3"
 sat-search = {version = "^0.3.0", optional = true}
 scipy = "^1.6.1"
 sphinx-autodoc-typehints = {version = "^1.11.1", optional = true}
-xarray = "^0.17.0"
+xarray = ">=0.18,<1"
 
 [tool.poetry.dev-dependencies]
 Pympler = "^0.9"
@@ -54,7 +54,7 @@ graphviz = "^0.16"
 jupyterlab = "^3.0.14"
 keyring = "^23.0.1"
 py-spy = "^0.3.4"
-pystac = "^0.5.4"
+pystac = "^0"
 snakeviz = "^2.1.0"
 sphinx-autobuild = "^2021.3.14"
 twine = "^3.4.1"