update min deps (#50)

* update minimum dependencies

* update installation

Author: mathause

ci/requirements/py37-min-all-deps.yml

@@ -4,12 +4,12 @@ channels:
   - nodefaults
 dependencies:
   - python=3.7
-  - cartopy=0.17
+  - cartopy=0.18
   - matplotlib-base=3.4
   - numpy=1.17
   - seaborn=0.11
   - setuptools=40.4
-  - xarray=0.15
+  - xarray=0.18
 # for testing
   - pytest
   - pytest-cov

docs/installation.md

@@ -5,12 +5,12 @@
 - Python (3.7 or later)
 - [numpy](http://www.numpy.org/) (1.17 or later)
 - [matplotlib](http://matplotlib.org/) (3.4 or later)
-- [cartopy](http://scitools.org.uk/cartopy/) (0.17 or later)
+- [cartopy](http://scitools.org.uk/cartopy/) (0.18 or later)
 
 ## Optional dependencies
 
 -   [seaborn](https://seaborn.pydata.org/) (0.11 or later)
--   [xarray](http://xarray.pydata.org/) (0.15 or later)
+-   [xarray](http://xarray.pydata.org/) (0.18 or later)
 
 ## Instructions
 

requirements.txt

@@ -2,7 +2,7 @@
 # it exists to let GitHub build the repository dependency graph
 # https://help.github.com/en/github/visualizing-repository-data-with-graphs/listing-the-packages-that-a-repository-depends-on
 
-cartopy >= 0.17
+cartopy >= 0.18
 matplotlib >= 3.4
 numpy >= 1.17
 setuptools >= 40.4  # for pkg_resources

setup.cfg

@@ -26,7 +26,7 @@ zip_safe = False  # https://mypy.readthedocs.io/en/latest/installed_packages.htm
 include_package_data = True
 python_requires = >=3.7
 install_requires =
-    cartopy >= 0.17
+    cartopy >= 0.18
     matplotlib >= 3.4
     numpy >= 1.17
     setuptools >= 40.4  # for pkg_resources