lib: relax base16 upper bound

Author: jtobin

ppad-script.cabal

@@ -31,7 +31,7 @@ library
       base >= 4.9 && < 5
     , bytestring >= 0.9 && < 0.13
     , primitive >= 0.8 && < 0.10
-    , ppad-base16 >= 0.1 && < 0.2
+    , ppad-base16 >= 0.1 && < 0.3
 
 test-suite script-tests
   type:                exitcode-stdio-1.0