Fix variable of django_version

kaizumaki · kaizumaki · commit dcef0b266a56 · 2019-09-02T13:08:50.000+09:00
diff --git a/book.json b/book.json
@@ -1,7 +1,7 @@
 {
     "gitbook": ">=3.2.0",
     "variables": {
-      "django_version": "2.0.6"
+      "django_version": "2.2.4"
     },
     "links": {
         "sidebar": {
