unifying the pypi settings

removing second poetry build call, since they can be done in one

Author: chayim

.circleci/config.yml

@@ -60,10 +60,9 @@ commands:
 
 
       - run:
-          name: build
+          name: build sdist and wheels
           command: |
-            poetry build --format sdist
-            poetry build --format wheel
+            poetry build
 
       - run:
           name: lint

pyproject.toml

@@ -10,6 +10,10 @@ classifiers=[
     'Topic :: Database',
     'Programming Language :: Python',
     'Intended Audience :: Developers',
+    'Programming Language :: Python :: 3.6',
+    'Programming Language :: Python :: 3.7',
+    'Programming Language :: Python :: 3.8',
+    'Programming Language :: Python :: 3.9',
     'License :: OSI Approved :: BSD License',
     'Development Status :: 5 - Production/Stable'
 ]