tests: replacing for..in loop by for..of to access arrays index as suggested by larsgw https://github.com/maxlath/wikidata-sdk/pull/13#issuecomment-270006640
tests: replacing for..in loop by for..of to access arrays index
as suggested by larsgw https://github.com/maxlath/wikidata-sdk/pull/13#issuecomment-270006640

maxlath/wikidata-sdk,maxlath/wikidata-sdk,maxlath/wikidata-sdk