remove 1.6 from test script

Author: fogus

run-tests.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-versions="1.6 1.7 1.8 1.9 1.10 1.11 1.12"
+versions="1.7 1.8 1.9 1.10 1.11 1.12"
 for v in $versions
 do
   time clj -M:test:runner:$v