Add gon config file for OS X notarization

Author: silvanocerza

gon.config.hcl

@@ -0,0 +1,12 @@
+source = ["dist/macos64/FirmwareUpdater"]
+bundle_id = "cc.arduino.FirmwareUpdater"
+
+sign {
+  application_identity = "Developer ID Application: ARDUINO SA (7KT7ZWMCJT)"
+}
+
+# Ask Gon for zip output to force notarization process to take place.
+# The CI will ignore the zip output, using the signed binary only.
+zip {
+  output_path = "FirmwareUpdater.zip"
+}