Mass sg & pl format seems incorrect. Causing issues with generated UoMs.

[SamGrayson]

First off, thank you for the awesome library. It's making our UoM conversions much easier.

Just a small issue we've noticed here: https://github.com/harrydehix/simple-units/blob/58ddee457f799c4b202f8bbc14bf7822a017cbf7/src/units/groups/mass.ts#L12-L18

• It appears the mass base unit has the wrong pl.
• Should it be?...

  long: {
          sg: ["%0gram", "%0gramme"],
          pl: ["%0grams", "%0grammes"],
      }

This is causing issues down the line when trying to leverage long names for generated UoMs.

• ex: kilogram returns: pl: ['kilogram', 'kilograms']

I haven't had a chance yet to check out the other groups.

[harrydehix]

Thank you very much, I'll fix this today!

[harrydehix]

Should be fixed now!