Fixed matrix jobs missing

.travis.yml

@@ -8,6 +8,8 @@ env:
   matrix:
     - BOARD="esp8266:esp8266:generic:xtal=80,eesz=4M3M,ip=lm2f,exception=disabled,FlashMode=qio,FlashFreq=80"
     - BOARD="esp32:esp32:esp32:FlashFreq=80,FlashSize=4M"
+    - ARDJSON="5.13.5"
+    - ARDJSON="6.12.0"
 before_install:
   - "/sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_1.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :1 -ac -screen 0 1280x1024x16"
   - sleep 3
@@ -24,9 +26,7 @@ before_install:
       arduino --install-boards esp32:esp32;
     fi
   - arduino --install-library PubSubClient,PageBuilder:1.3.4
-  - arduino --install-library ArduinoJson:5.13.5
-  - buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
-  - arduino --install-library ArduinoJson:6.12.0
+  - arduino --install-library ArduinoJson:$ARDJSON
   - buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
 install:
   - mkdir -p ~/Arduino/libraries