'Index' is not a member type of 'Operation' #607
Description
I just upgraded to Xcode 10.2 and now I'm getting compiler errors from FlatDataSourceChangesetConvertible.swift. The compiler errors are caused by OrderedCollectionChangeset where clauses.
.../FlatDataSourceChangesetConvertible.swift:76:79: 'Index' is not a member type of 'Operation'
.../FlatDataSourceChangesetConvertible.swift:76:167: 'Element' is not a member type of 'Operation'
.../FlatDataSourceChangesetConvertible.swift:78:90: 'Index' is not a member type of 'Operation'
.../FlatDataSourceChangesetConvertible.swift:78:178: 'Element' is not a member type of 'Operation'
.../FlatDataSourceChangesetConvertible.swift:76:1: 'FlatDataSourceChangeset' requires the types 'Collection.Item' and 'Collection.Element' be equivalent
Swift 4.2 is still selected as the Swift Language Version in build settings.