fix: move pytest.ini into setup.cfg

pytest.ini

@@ -1,11 +0,0 @@
-[pytest]
-addopts =
-    # show summary of all tests that did not pass
-    -ra
-    # enable all warnings
-    -Wd
-    # coverage and html report
-    --cov=waybackpy
-    --cov-report=html
-testpaths =
-    tests

setup.cfg

@@ -71,3 +71,15 @@ python_version = 3.9
 show_error_codes = True
 pretty = True
 strict = True
+
+[tool:pytest]
+addopts =
+    # show summary of all tests that did not pass
+    -ra
+    # enable all warnings
+    -Wd
+    # coverage and html report
+    --cov=waybackpy
+    --cov-report=html
+testpaths =
+    tests