Merge pull request #974 from haskell/pr-973-since-key

Add `@since` documentation (#882)

Author: phadej

src/Data/Aeson/Key.hs

@@ -3,6 +3,11 @@
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE TemplateHaskellQuotes #-}
 
+-- |
+-- Strong type for JSON keys.
+--
+-- @since 2.0.0.0
+
 module Data.Aeson.Key (
     Key,
     fromString,

src/Data/Aeson/KeyMap.hs

@@ -8,6 +8,8 @@
 
 -- |
 -- An abstract interface for maps from JSON keys to values.
+--
+-- @since 2.0.0.0
 
 module Data.Aeson.KeyMap (
     -- * Map Type