Highlight typing hints in a different color than ordinary code.

Typing hints are displayed in the same color as python variables and statements. That looks somewhat confusing and makes it harder to see at once where is a typing hint, where a variable name is defined and where is an actual code.

E.g., the line below up to ‘origin’ is in the same color.

  remote: pygit2.Remote = gitrepo.remotes['origin']

[vpetrovykh]

I’ll see what I can do to highlight type hints better. I guess the starting point would be to at least give them all a scope of their own like meta.typehint.python.

[cardoso-neto]

It appears Github’s highlighting decided that everything that starts with a capital letter deserves that same color. I’m still inclined towards having separate scopes for typehints and for normal classes, so we can choose different colors.