to-input-stream not lazy on lazy seqs

Contrary to the https://raw.githubusercontent.com/ztellman/byte-streams/0.2.0/README.md#L37

```
=> (to-input-stream (repeat "hello"))

OutOfMemoryError Requested array size exceeds VM limit  java.util.Arrays.copyOf (Arrays.java:3332)
```

is not lazy.
