update windows build to Python 3.7

Lib/distutils/tests/test_versionpredicate.py

@@ -0,0 +1,13 @@
+"""Tests harness for distutils.versionpredicate.
+
+"""
+
+import distutils.versionpredicate
+import doctest
+from test.support import run_unittest
+
+def test_suite():
+    return doctest.DocTestSuite(distutils.versionpredicate)
+
+if __name__ == '__main__':
+    run_unittest(test_suite())