add schema

schema/20190115-1.sql

@@ -0,0 +1,5 @@
+alter table public.cards
+  add tcgplayerid int default -1 not null;
+
+alter table public.sets
+  add tcgplayerid int default -1 not null;

schema/dbVersion.json

@@ -1,7 +1,8 @@
 {
   "versions": [
     {"file": "main.sql", "version": 1},
-    {"file": "20190106-1.sql", "version": 2}
+    {"file": "20190106-1.sql", "version": 2},
+    {"file": "20190115-1.sql", "version": 3}
   ],
   "test": []
 }