drop py37 support

Author: Jhsmit

.github/workflows/pytest.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2

setup.cfg

@@ -15,7 +15,6 @@ classifier =
     Development Status :: 4 - Beta
     Intended Audience :: Science/Research
     Natural Language :: English
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
 
@@ -36,7 +35,7 @@ install_requires =
     distributed
     packaging
 python_requires =
-    >=3.7
+    >=3.8
 
 [options.entry_points]
 console_scripts =