Convert UPM to 2048

[rsms]

I've started work on converting Inter to UPM 2048 in the upm2048 branch

Two key reasons for this change:

1. Inter Display is designed at 2048 — this change will make it possible to some day merge Display and standard "Text" Inter into one VF.
2. Some old font rasterizers and printer drivers/firmware has bugs that causes issues with certain UPM. (For example see Printing issues with Microsoft Word #156)

After a few hours of initial work, the 2048 UPM version renders almost identical in both Figma and web browsers compared to the current 2816 UPM version:

The biggest downside of converting to 2048 UPM is that design work gets harder since 1dp@11dp no longer corresponds to a power-of-two number which in turn means that a assisting grid for snapping and visual assist is no longer possible. I think this is a totally okay trade off.

Latest test build: Inter-4.00-e77ce318de.zip

[rsms]

Beta build for testing: Inter-3.19-text-faded04f9f.zip
Edit: DO NOT USE. Instead, use link in main post at the top.

[kenmcd]

Beta build for testing: Inter-3.19-text-faded04f9f.zip

Some of the fonts are 2048 UPM, some of them are 1000 UPM.
Appears to be the same in both OTF and TTF.

Thin - 2048
ExtraLight - 1000
Light - 1000
Regular - 2048
Medium - 1000
SemiBold - 1000
Bold - 1000
ExtraBold - 1000
Black - 2048

Looks like the masters are 2048, but the other instances are being built with 1000.

[rsms]

Thanks @kenmcd for catching that. It is an issue with the new version of glyphsLib. I've added a work-around and made a fresh build which can be grabbed from the main post above.

[rsms]

Moved to #462