Update From Caen to Evreux.

Add support for inversion and ack the version change (Normandy is
unaffected by ID updates).

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1232

resources/campaigns/caen_to_evreux.json

@@ -7,5 +7,5 @@
   "description": "<p>This is a light scenario on the Normandy map.</p><p>August 1944, allied forces are pushing from Caen/Carpiquet to the cities of Lisieux and Evreux.<p>Lisieux is an important logistic hub for the Werhmacht, and Evreux airbase is hosting most of the Luftwaffe forces in the region.</p>",
   "miz": "caen_to_evreux.miz",
   "performance": 1,
-  "version": "6.0"
+  "version": "7.0"
 }