Drop 3.7 support per pydata/xarray#5892

Author: banesullivan

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9, "3.10"]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python

setup.py

@@ -36,7 +36,7 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     install_requires=[
         "xarray<2022.9.0,>2022.3.0",
         "pyvista",  # TODO: set minimum version for shared array patch in https://github.com/pyvista/pyvista/pull/2697