Previously nested dictionary types, such as [String: String] and [String: [String]] would be exported under the same name (e.g. FfiConverterDictionaryStringString) leading to compilation issues.
This test ensures that nested dictionaries can be disambiguated in roughly the following way:
[String: String]=>...DictionaryStringString[String: [String]]=>...DictionaryStringSequenceString[String: [String: String]]=>...DictionaryStringDictionaryStringString[String: [String: [String]]]=>...DictionaryStringDictionaryStringSequenceString- etc