Charging 18650 cells in parallel?
You theoretically don't need anything, but there are drawbacks:


The charging will be 10 times slower compared to a single cell charged from a TP4056 
A damaged cell will cause the others in the pack to drain and you'll never be able to charge or maintain the pack at full capacity.
A damaged cell will also cause even more slower charging.


So if you make sure all cells are good, you should be fine for a while.