.max and :exists don't highlight

[samcv]

Describe what you see, what you want to see, and perhaps some linkage to docs, synopses, or irclog chatter.

Example Code

@array.max;
%hash{$key}:exists;

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• [ ] Fixed in Master
• [ ] Fixed in Release
• [ ] Has Tests
• [ ] Passes Tests

[samcv]

:exists highlights now. But I want some tests for:

%hash<key>:exists
%hash{'key'}:exists
%hash<key>:!exists
%hash{'key'}:!exists

.max does not highlight though atm