Fix compilation warning about Monoid

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Revision history for SJW
 
+## 0.1.2.2 -- 2020-12-08
+
+* Add tests and a benchmark
+* Fix compilation warning about Monoid
+
 ## 0.1.2.1 -- 2020-05-21
 
 * Fix bug in loop reporting causing in some cases the display of an inaccurate loop instead of the one actually detected

SJW.cabal

@@ -3,7 +3,7 @@ cabal-version:       >=1.10
 -- further documentation, see http://haskell.org/cabal/users-guide/
 
 name:                SJW
-version:             0.1.2.1
+version:             0.1.2.2
 synopsis:            The Simple Javascript Wrench is a very simple tool to pack several JS «modules» into a single script.
 -- description:
 homepage:            https://git.marvid.fr/Tissevert/SJW
@@ -25,14 +25,16 @@ library
                      , SJW.Module.File
                      , SJW.Module.Imports
                      , SJW.Source
-  build-depends:       attoparsec
+  build-depends:       attoparsec >= 0.13.2 && < 0.14
                      , base >=4.9 && <4.15
-                     , containers
+                     , containers >= 0.6.0 && < 0.7
-                     , directory
+                     , directory >= 1.3.3 && < 1.4
-                     , filepath
+                     , filepath >= 1.4.2 && < 1.5
-                     , mtl
+                     , mtl >= 2.2.2 && < 2.3
-                     , text
+                     , random >= 1.1 && < 1.3
-                     , unix
+                     , text >= 1.2.3 && < 1.3
+                     , time >= 1.9.0 && < 1.12
+                     , unix >= 2.7.2 && < 2.8
   hs-source-dirs:      src
   default-language:    Haskell2010
   ghc-options:         -Wall
@@ -41,18 +43,18 @@ executable sjw
   main-is:             src/Main.hs
   other-modules:       Paths_SJW
   -- other-extensions:
-  build-depends:       attoparsec
+  build-depends:       attoparsec >= 0.13.2 && < 0.14
                      , base >=4.9 && <4.15
-                     , optparse-applicative
+                     , optparse-applicative >= 0.15 && < 0.17
                      , SJW
-                     , text
+                     , text >= 1.2.3 && < 1.3
   default-language:    Haskell2010
   ghc-options:         -Wall
 
 benchmark big-src
   type:                exitcode-stdio-1.0
   main-is:             benchmark/Main.hs
-  build-depends:       base >= 4.9 && <4.15
+  build-depends:       base
                      , directory
                      , filepath
                      , random
@@ -64,7 +66,7 @@ benchmark big-src
 test-suite tests
   type:                detailed-0.9
   test-module:         Tests
-  build-depends:       base >=4.11 && <4.13
+  build-depends:       base
                      , Cabal
                      , directory
                      , filepath

src/Main.hs

@@ -1,8 +1,11 @@
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE CPP #-}
 module Main where
 
 import Control.Applicative (many, optional)
+#if !MIN_VERSION_base(4,11,0)
 import Data.Monoid ((<>))
+#endif
 import qualified Data.Text as Text (unpack)
 import Data.Version (showVersion)
 import Options.Applicative (