README says mathrm is to be implemented

[steffenhaug]

In the README. \mathrm is listed as "to be implemented",

MathTeXEngine.jl/README.md

Lines 124 to 128 in 0c143f0

	## To be implemented
	| Description | LaTeX example | Head | Fields | Comment |
	|--|--|--|--|--|
	| Basic font | `\mathrm{d}` | `:font` | `fontstyle, content` |

but from what I can tell, it is implemented: (Using it via Makie)

Is there anything missing in the implementation to warrant saying it is not implemented yet, or is it an oversight? I was initially disappointed and then very (pleasantly) surprised that it worked when I decided to try it anyways just in case.

[Kolaru]

It is an oversight (now fixed).

Thanks for the issue !

As a side note, the textrm implementation is still faulty, but that's a different problem.