remove higher minizinc requirement, was for testing

cpmpy/solvers/minizinc.py

@@ -78,7 +78,7 @@ def supported():
             import minizinc
             from minizinc import default_driver
             version_tuple = (2, 8, 0) # minimum required version
-            if default_driver.parsed_version >= (2, 8, 3):
+            if default_driver.parsed_version >= version_tuple:
                 return True
             else:
                 version = str(version_tuple[0])