v0.5.19

• The return of store type StoreSetSum which allows both summing and setting a value in a store. This is useful for storing aggregated values in a store. Note: to read deltas from this store, you will need to use the Deltas type. The delta values will come prefixed with "set:" or "sum:" depending on the operation, followed by the string representation of the value. It is up to the user to decode the values as necessary.