Properly support selector lists

[shagkur]

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Please ignore the pom.xml changes (we currently need them to fulfill our dependency repository requirements when fetching such custom changed builds). We do this because of having the need changes/fixes available quickly. The important part is the parser change(s) and the SelectorMember changes i made. You might consider introducing something like CSSRelativeSelector consisting of a combinator field and an array of selector members (:has can hold a list of relative selectors) And pseudoIs and pseudoWhere did not handle a selector list at all