Build is broken on current gftools

Building the font with gftools 0.3.14 is broken:

Traceback (most recent call last):
  File "/usr/bin/gftools-fix-vf-meta.py", line 206, in <module>
    main()
  File "/usr/bin/gftools-fix-vf-meta.py", line 196, in main
    update_nametable(roman_font)
  File "/usr/bin/gftools-fix-vf-meta.py", line 134, in update_nametable
    raise ValueError(f"Fvar instance coord {wght_val} needs to be "
ValueError: Fvar instance coord 450.0 needs to be within range 0-1000 and be a multiple of 100

This can be hacked around to build by disabling these two lines:

gftools fix-vf-meta $firaCodeVF
mv $firaCodeVF.fix $firaCodeVF

Obviously that isn't the right fix, but I don't know what is. Probably a map between the hundred-increment weight classes and the actual point on the weight interpolation scale you want it to map too.

(Just checked and the latest gftools 0.4.0 is giving the same error.)

Reproduce the failure with gftools 0.3.14 or 0.4.0 using the build invocation that runs gftools fix-vf-meta and moves the .fix file back. Inspect the font build inputs and weight interpolation values around the reported 450.0 coordinate. Done means the font builds successfully without disabling those two commands.