Merge pull request #76 from tweag/fix-ci

Fix CI errors due to warnings

Author: aspiwack

src/Capability/Sink/Internal/Strategies.hs

@@ -113,8 +113,7 @@ deriving via ((t2 :: (* -> *) -> * -> *) ((t1 :: (* -> *) -> * -> *) m))
 
 -- | Convert the state using safe coercion.
 instance
-  ( Coercible from to, HasSink tag from m
-  , forall x y. Coercible x y => Coercible (m x) (m y) )
+  ( Coercible from to, HasSink tag from m )
   => HasSink tag to (Coerce to m)
   where
     yield_ tag = coerce @(from -> m ()) $ yield_ tag

src/Capability/Writer.hs

@@ -37,7 +37,7 @@
 {-# LANGUAGE UnboxedTuples #-}
 {-# LANGUAGE UndecidableInstances #-}
 
-{-# OPTIONS_GHC -Wno-simplifiable-class-constraints #-}
+{-# OPTIONS_GHC -Wno-simplifiable-class-constraints -Wno-deprecations #-}
 
 module Capability.Writer
   ( -- * Interface