YAML syntax highlighting breaks with double colons in key names

[alexmuller]

I believe this is valid YAML:

---

this::is::a::valid::yaml::key: "this is a valid string value"

When I parse it in Ruby I get this which is corrrect:

{"this::is::a::valid::yaml::key"=>"this is a valid string value"}

But the syntax highlighting in Sublime Text 3083 breaks:

#41 has a lot of discussion about YAML.

[FichteFoll]

A proposed fix for this is already available at sublimehq/Packages#90.