Fix: use bash for bashism in oxford_asl

script uses bash arrays, use /usr/bin/env bash instead of /bin/sh

src/oxford_asl/oxford_asl

-#!/bin/sh
+#!/usr/bin/env bash
 
 # OXFORD_ASL: Converts ASL images in to perfusion maps
 #
@@ -1469,4 +1469,4 @@ fi
 
 
 echo "Output is $outdir/"
-echo "OXFORD_ASL - done."
\ No newline at end of file
+echo "OXFORD_ASL - done."