Specifies a valid version of ArduinoJson clearly. Issue #47

.travis.yml

@@ -23,7 +23,7 @@ before_install:
   - if [[ "$BOARD" =~ "esp32:esp32:" ]]; then
       arduino --install-boards esp32:esp32;
     fi
-  - arduino --install-library PubSubClient,ArduinoJson:5.13.4,PageBuilder:1.3.2
+  - arduino --install-library PubSubClient,ArduinoJson:5.13.3,PageBuilder:1.3.2
   - buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
 install:
   - mkdir -p ~/Arduino/libraries

library.json

@@ -13,6 +13,10 @@
     {
       "name": "PageBuilder",
       "version": ">=1.3.2"
+    },
+    {
+      "name": "ArduinoJson",
+      "version": ">=5.13.3,<6.0.0"
     }
   ],
   "frameworks": "arduino",