Merge pull request #101 from haskell/ghc-events-0.12

Relax upper version bound for ghc-events

Author: maoe

threadscope.cabal

@@ -55,7 +55,7 @@ Executable threadscope
                      array < 0.6,
                      mtl < 2.3,
                      filepath < 1.5,
-                     ghc-events >= 0.5 && < 0.12,
+                     ghc-events >= 0.5 && < 0.13,
                      containers >= 0.2 && < 0.7,
                      deepseq >= 1.1,
                      text < 1.3,