replace shop=general_store with shop=general (#476)

Author: westnordost

data/deprecated.json

@@ -1403,6 +1403,10 @@
     "old": {"shop": "gallery"},
     "replace": {"shop": "art"}
   },
+  {
+    "old": {"shop": "general_store"},
+    "replace": {"shop": "general"}
+  },
   {
     "old": {"shop": "insurance"},
     "replace": {"office": "insurance"}