Update ArduinoJson requirement from ^6.21.4 to ^7.0.4

Updates the requirements on [ArduinoJson](https://github.com/bblanchon/ArduinoJson) to permit the latest version.
- [Release notes](https://github.com/bblanchon/ArduinoJson/releases)
- [Commits](https://github.com/bblanchon/ArduinoJson/commits/36e1eecc7d246d829bc51e61d6ac541893c646a3)

---
updated-dependencies:
- dependency-name: ArduinoJson
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -27,7 +27,7 @@
     "cQueue": "SMFSW/cQueue#semver:^1.9.0",
     "TheengsDecoder": "theengs/decoder#semver:^1.5.7",
     "arduino-mqtt": "256dpi/arduino-mqtt#semver:^2.5.1",
-    "ArduinoJson": "bblanchon/ArduinoJson#semver:^6.21.4",
+    "ArduinoJson": "bblanchon/ArduinoJson#semver:^7.0.4",
     "pocketBME280": "angrest/pocketBME280#semver:^1.2.4",
     "NimBLE-Arduino": "h2zero/NimBLE-Arduino#semver:^1.4.1",
     "Sensirion I2C SCD4x": "Sensirion/arduino-i2c-scd4x#semver:^0.4.0",