Merge pull request #97 from theochem/remove_python37

Removed support for Python versions less than 3.9

.github/workflows/pytest.yaml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest"]
-        py: ["3.7", "3.9", "3.10", "3.11"]
+        py: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: "actions/checkout@v3"
@@ -32,6 +32,7 @@ jobs:
 
       - name: Install extra test dependencies
         run: |
+          pip install --upgrade pip
           pip install .[test_extra]
 
       - name: Run pytest default tests

pyproject.toml

@@ -25,7 +25,7 @@ authors = [
 description = "AtomDB is a database of atomic and ionic properties."
 readme = "README.rst"
 license = {text = "GPL-3.0-or-later"}
-requires-python = ">=3.7"
+requires-python = ">=3.9"
 classifiers = [
    'Development Status :: 0 - Released',
     'Environment :: Console',
@@ -36,8 +36,6 @@ classifiers = [
     'Intended Audience :: Science/Research',
     "Intended Audience :: Education",
     "Natural Language :: English",
-    'Programming Language :: Python :: 3.7',
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",