Apt package for raspian is outdated

[This page](https://playground.arduino.cc/Linux/Raspbian) states that:
> Note: This will install an old version of Arduino, and may not support some of the newer boards. You can not download a newer version from the website, because there is no ARM version.

I'm not sure which version it installs by default, but it's older than 1.6.14, because it doesn't have the fix described [here](https://github.com/arduino/Arduino/issues/1981) yet.

However, there is an ARM version available on the website. I have downloaded it using `wget https://downloads.arduino.cc/arduino-1.8.5-linuxarm.tar.xz`, and it works for verifying and uploading from a headless OS.

Can the apt package for raspbian be updated to a newer version?

Start by reviewing the Raspbian instructions linked in the issue and the ARM archive URL for Arduino 1.8.5, then locate how this repository publishes or references the apt package. Done means the Raspbian package points to a newer supported Arduino version and the documented installation no longer warns that no ARM version is available.

Written by the indexing model from the issue text.