Add since pragmas for StrictText, LazyText, LazyTextBuilder

Author: Bodigrim

src/Data/Text/Internal.hs

@@ -66,6 +66,8 @@ data Text = Text
     {-# UNPACK #-} !Int     -- ^ length in bytes (not in Char!), pointing to an end of UTF-8 sequence
 
 -- | Type synonym for the strict flavour of 'Text'.
+--
+-- @since 2.1.1
 type StrictText = Text
 
 -- | Smart constructor.

src/Data/Text/Internal/Builder.hs

@@ -97,6 +97,7 @@ newtype Builder = Builder {
                 -> ST s [S.Text]
    }
 
+-- | @since 2.1.2
 type LazyTextBuilder = Builder
 
 instance Semigroup Builder where

src/Data/Text/Internal/Lazy.hs

@@ -56,6 +56,8 @@ data Text = Empty
           -- ^ Chunks must be non-empty, this invariant is not checked.
 
 -- | Type synonym for the lazy flavour of 'Text'.
+--
+-- @since 2.1.1
 type LazyText = Text
 
 -- $invariant