Fix for CONPY-85:

Version checking in setup fails with 2 digit minor or patch version number.
Instead of comparing version numers directly we need to parse them before
using packaging.version.parse().

mariadb_posix.py

@@ -2,6 +2,7 @@
 
 import subprocess
 import sys
+from packaging import version
 
 
 class MariaDBConfiguration():
@@ -35,7 +36,7 @@ def dequote(s):
 
 
 def get_config(options):
-    required_version = "3.1.3"
+    required_version = "3.1.5"
     no_env = 0
     static = options["link_static"]
 
@@ -47,7 +48,7 @@ def get_config(options):
         config_prg = "mariadb_config"
 
     cc_version = mariadb_config(config_prg, "cc_version")
-    if cc_version[0] < required_version:
+    if version.parse(cc_version[0]) < version.parse(required_version):
         print ('MariaDB Connector/Python requires MariaDB Connector/C >= %s, found version %s' % (
             required_version, cc_version[0]))
         sys.exit(2)

mariadb_windows.py

@@ -3,6 +3,7 @@
 import sys
 
 from winreg import *
+from packaging import version
 
 
 class MariaDBConfiguration():
@@ -38,7 +39,7 @@ def get_config(options):
                                           'SOFTWARE\\MariaDB Corporation\\MariaDB Connector C 64-bit',
                                           access=KEY_READ | KEY_WOW64_64KEY)
               cc_version = QueryValueEx(connector_key, "Version")
-              if cc_version[0] < required_version:
+              if version.parse(cc_version[0]) < version.parse(required_version):
                   print("MariaDB Connector/Python requires MariaDB Connector/C >= %s (found version: %s") \
                        % (required_version, cc_version[0])
                   sys.exit(2)