We're now able to correctly identify Map keys within JsonPatch paths so that e.g. people/Dave/name properly translates into a people['Dave'].name SpEL expression.
Streamlined the design of SpelPath to avoid duplicate parsing and properly express the difference between typed and untyped paths in the type hierarchy. Slightly refactored the type hierarchy so that only methods that make sense in either untyped or typed state appear on the instance returned (getLeafType(Class) was exposed on TypedSpelPath before, which was confusing).