I wanna change the arrows into $\mapsto$ in the following diagram:

```
\begin{center}
\begin{tikzcd}[arrows=<-]
  & s'_1 \ar[rd,"j_1^*"]\\
  s \ar[ru,"i_1^*"] \ar{r}{i_2^*} \ar[rd,"i_3^*"'] & s'_2 \ar[r,"j_2^*"] & s'\\
  & s'_3 \ar[ru,"j_3^*"']
\end{tikzcd}
\end{center}

```

Any help will be greatly appreciated!