Auto merge of #2271 - JohnTitor:futf, r=jtgeibel

Update `futf` to 0.1.4

This is a tiny change, updates `futf` to 0.1.4 to remove `debug_unreachable` and `unreachable`.

Output:
```
Removing debug_unreachable v0.1.1
Updating futf v0.1.3 -> v0.1.4
Removing unreachable v0.1.1
```