strict type in circular demo schema

demo/docs/bad_circular_A_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,

demo/docs/bad_circular_B_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,

demo/docs/bad_circular_C_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,

demo/docs/circular_A_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,

demo/docs/circular_B_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,

demo/docs/circular_C_schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "title": "Settings for XMLA connection",
+  "type": "object",
   "properties": {
     "url": {
       "uniqueItems": true,