fix: TestPolicyExamples/Any case

[fabiobozzo]

Statement: ["any", ".a", ["==", ".b", 2]]
Data: {"a": [{"b": 1}, {"b": 2}, {"z": [7, 8, 9]}]}

Selector selects a sub-slice at first (many): [{"b": 1}, {"b": 2}].

Furthermore, the case seg.Field() != "" was not equipped to handle subject ipld.Node of kind 'Kind_List'.

[smoyer64]

Didn't you have to also change that "supported forms" test that was missing the }?

[fabiobozzo]

@smoyer64 that was in my previous (larger) PR: #18 👈 Please check that out, too.

[smoyer64]

Ah - #18 is merged (I knew I saw that change when we discussed the bad IPLD syntax)