go.mod references leb.io

Thanks for the work done, was just about pulling the hash code out of the go source myself =).

But here we go:
```
	github.com/tildeleb/aeshash: github.com/tildeleb/aeshash@v0.1.2: parsing go.mod:
	module declares its path as: leb.io/aeshash
	        but was required as: github.com/tildeleb/aeshash
```
