bump containers

Author: ulysses4ever

rere.cabal

@@ -55,7 +55,7 @@ library
   -- GHC boot libraries
   build-depends:
     , base          >=4.3.0.0  && <4.21
-    , containers    ^>=0.4.0.0 || ^>=0.5.0.0 || ^>=0.6.0.1 || ^>=0.7
+    , containers    >=0.4.0.0 && <0.9
     , parsec        ^>=3.1.12.0
     , transformers  ^>=0.3.0.0 || ^>=0.4.2.0 || ^>=0.5.2.0 || ^>=0.6.1.0