"(B|E|T)-Mult" are not highlighted

[Deleted user]

Derivation Rules of B-Mult, E-Mult and T-Mult are not highlighted.
T-Mult is a rule of PolyTypingML4.
E-Mult and B-Mult are rules of EvalRefML3.
These rules may be in master/src/extension.ts

[kitagawa-hr]

closed by #2