testsuite failing for Stackage Nightly

[juhp]

I am not sure why but the testsuite has started to fail for Stackage Nightly:

    Failures:                                                                                                                      
                                                                                                                                   
      test/main.hs:230:26:                                                                                                         
      1) html block xss                                                                                                            
           expected: "alert("evil")"                                                                                     
            but got: ""                                                                                                            
                                                                                                                                   
      To rerun use: --match "/html/block xss/"                                                                                     
                                                                                                                                   
    Randomized with seed 1052063679                                                                                                
                                                                                                                                   
    Finished in 0.0591 seconds                                                                                                     
    151 examples, 1 failure                                                                                                        

[snoyberg]

See yesodweb/haskell-xss-sanitize#24 for a similar issue. I'll release a new version of Markdown.