RNA stranded sequencing with wrong XS tags


Dear @kcotto @yang-yangfeng and other authors,

Thanks for the great tool!

When I use STAR mapping stranded RNA sequencing data with wrong parameter
```
 --outSAMstrandField intronMotif
```
but when use regtools 

```
regtools junctions extract -a 8 -m 50 -M 500000 -s RF
```

The results will be OK? or not.

Thanks in advanced!