test: do not run tests on python 3.7 and 3.8

Do not mark 3.7 and 3.8 as explicitly supported in the classifiers.

The package is still installable on python 3.7 plus but may experience dependency issues
as current versions of some dependencies are not functional on these versions

.github/workflows/python-package.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
 
-        python-version: ['3.7', '3.8', '3.9', '3.10', "3.11", "3.12"]
+        python-version: ['3.9', '3.10', "3.11", "3.12"]
         os: [ubuntu-latest, windows-latest, macos-12]
 
     steps:
@@ -30,10 +30,9 @@ jobs:
         python -m pip install --upgrade pip
         pip install -r test_requirements.txt
         pip install -r requirements.txt
-        pip install pympler tdigest
     - name: Install package
       run: |
-        pip install -e .[distributed,test]
+        pip install -e .[distributed,test,ecos]
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

setup.py

@@ -45,7 +45,14 @@ def run(self):
 # extra requirements
 extras_require = {
     'distributed': ['pympler', 'tdigest'],
-    'test': ['coverage', 'flake8', 'pytest', 'pyarrow'],
+    'test': [
+        'coverage', 
+        'flake8',
+        'pytest',
+        'pyarrow',
+        'pympler',
+        'tdigest',
+    ],
     # For ecos support: https://github.com/embotech/ecos 
     'ecos': ['ecos']
 }
@@ -82,8 +89,6 @@ def run(self):
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
         'Programming Language :: Python :: 3',
-        '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',

test_requirements.txt

@@ -1,4 +1,6 @@
 coverage
 flake8
 pytest
-pyarrow
+pyarrow
+pympler
+tdigest