Upgrade to MicroPython 19.1

[mjaskula]

Upgrade to MicroPython 19.1

MicroPython 19.1 has been released. We should make sure that the EuroPi software is compatible. And then update our documentation.

Test the following under 19.1:

• micropython install procedure
• All hardware (diagnostic script may be a good way)
• all contrib scripts
• anything referenced in the 19.1 change log that looks relevant

Update the following:

• MicroPython Install process to reference 19.1
• write documentation on upgrading 18 -> 19.1

[roryjamesallen]

I haven't tested every single script yet but I've 2 EuroPis running 19.1 for a week or two now and haven't seen any issues in the install procedure or operation

[redoxcode]

Same here 1.9.1 works fine and how to setup EuroPi with up to date firmware is documented. Closed?

[mjaskula]

Yeah, I think we're pretty close to closing this. I just upgraded one of my EuroPis and it seems fine. During the upgrade process I noticed some doc changes that I wanted to make, so I opened PR #197. I think that should do it for this issue.