GH-245: Updated to the most recent nightly CLI.

 - New CLI version: `20210324`.
 - The CLI has the fix for the missing core settings.

Ref: arduino/arduino-cli#1230

Closes #245.

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

Author: Akos Kitta

arduino-ide-extension/package.json

@@ -121,7 +121,7 @@
   ],
   "arduino": {
     "cli": {
-      "version": "0.17.0"
+      "version": "20210324"
     }
   }
 }