add arduino-lint check

Author: RobTillaart

.github/workflows/arduino-lint.yml

@@ -0,0 +1,10 @@
+on: [push, pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: arduino/arduino-lint-action@v1
+        with:
+          library-manager: update
+          compliance: strict

.github/workflows/jsoncheck.yml

@@ -1,10 +1,18 @@
-on: [push, pull_request]
+name: JSON check
+
+on:
+  push:
+    paths:
+      - '**.json'
+  pull_request:
+
 jobs:
-  lint:
+  test:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: arduino/arduino-lint-action@v1
-#       with:
-#         library-manager: update
-#         compliance: strict
+      - name: json-syntax-check
+        uses: limitusus/json-syntax-check@v1
+        with:
+          pattern: "\\.json$"
+