Tools/scripts: In pypi-get-latest-version.sh, exclude alpha/beta/rc versions

Tools/scripts/pypi-get-latest-version.sh

@@ -40,6 +40,7 @@ done
 fetch -o - https://pypi.python.org/pypi/$PACKAGE_NAME/json 2>/dev/null |
 	jq -r '.releases | keys[]' |
 	grep -v dev |
+	grep -v -E ".*(a|b|rc)[0-9]*$" |
 	version_sort |
 	tail -1 ||
 	echo "failed to find the Python package '$PACKAGE_NAME'"