Skip test_modules.py if Python version < 3.10 (#279)

  - MkDocs-Test incompatible with earlier versions

Author: fralau

test/fixture.py

@@ -12,7 +12,7 @@
 
 from super_collections import SuperDict
 from mkdocs_test import DocProject, MkDocsPage
-
+import os
 
 class MacrosPage(MkDocsPage):
     "Specific for MkDocs-Macros"

test/test_modules.py

@@ -3,6 +3,12 @@
 """
 
 import os
+import sys
+
+if sys.version_info < (3, 10):
+    print("Skipping MkDocs-Test tests: Python 3.10+ required.")
+    sys.exit(0)
+
 import pytest
 
 from .fixture import MacrosDocProject