Fix build for GHC < 8.4

Author: tbidne

src/Options/Applicative/Builder.hs

@@ -108,8 +108,8 @@ module Options.Applicative.Builder (
   ) where
 
 import Control.Applicative
-#if __GLASGOW_HASKELL__ <= 802
-import Data.Semigroup hiding (option)
+#if __GLASGOW_HASKELL__ < 804
+import Data.Semigroup hiding (Option, option)
 #endif
 import Data.String (fromString, IsString)
 

tests/Examples/ParserGroup/AllGrouped.hs

@@ -3,6 +3,7 @@
 
 module Examples.ParserGroup.AllGrouped (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 -- Tests the help page when every option belongs to some group i.e. there are

tests/Examples/ParserGroup/Basic.hs

@@ -3,6 +3,7 @@
 
 module Examples.ParserGroup.Basic (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 data LogGroup = LogGroup

tests/Examples/ParserGroup/CommandGroups.hs

@@ -4,6 +4,7 @@
 
 module Examples.ParserGroup.CommandGroups (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 data LogGroup = LogGroup

tests/Examples/ParserGroup/DuplicateCommandGroups.hs

@@ -4,6 +4,7 @@
 
 module Examples.ParserGroup.DuplicateCommandGroups (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 -- This test demonstrates that duplicate + consecutive groups are merged,

tests/Examples/ParserGroup/Duplicates.hs

@@ -3,6 +3,7 @@
 
 module Examples.ParserGroup.Duplicates (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 -- NOTE: This is the same structure as ParserGroup.Basic __except__

tests/Examples/ParserGroup/Nested.hs

@@ -3,6 +3,7 @@
 
 module Examples.ParserGroup.Nested (opts) where
 
+import Data.Semigroup ((<>))
 import Options.Applicative
 
 -- Nested groups. Demonstrates that group can nest.