Bump the upper bound of tasty to <1.6

[saurabhnanda]

the package is building successfully and the tests are passing

[saurabhnanda]

sorry, this is failing with the following error:

/workspace/tmp/tasty-test-reporter/src/Test/Tasty/Runners/Reporter.hs:219:35: error:
    • Couldn't match type ‘[GroupNames -> TraversalT StateIO Summary]’
                     with ‘GroupNames -> TraversalT StateIO Summary’
      Expected type: Tasty.TestName
                     -> [GroupNames -> TraversalT StateIO Summary]
                     -> GroupNames 
                     -> TraversalT StateIO Summary
        Actual type: String        
                     -> (GroupNames -> TraversalT StateIO Summary)
                     -> GroupNames 
                     -> TraversalT StateIO Summary
    • In the expression: runGroup  
      In the ‘foldGroup’ field of a record
      In the first argument of ‘Tasty.foldTestTree’, namely
        ‘Tasty.trivialFold         
           {Tasty.foldSingle = runTest consolePrintPolicy statusMap,
            Tasty.foldGroup = \ _ -> runGroup}’
    |                              
219 |           Tasty.foldGroup = \_ -> runGroup
    |                                   ^^^^^^^^