starting to bring to new version of ghc

hs-conllu.cabal

@@ -37,7 +37,7 @@ library
                        containers >0.5.8 && <0.6,
                        directory ==1.3.*,
                        filepath ==1.4.*,
-                       megaparsec ==6.*,
+                       megaparsec <0.8,
                        void <1
   hs-source-dirs:      src
   default-language:    Haskell2010

src/Conllu/Parse.hs

@@ -1,4 +1,3 @@
--- |
 -- Module      :  Conllu.Parse
 -- Copyright   :  © 2018 bruno cuconato
 -- License     :  LPGL-3
@@ -61,7 +60,8 @@ import           Data.Maybe
 import           Data.Void (Void)
 
 import Text.Megaparsec
-       (ParseError, Parsec, (<?>), (<|>), between, choice, eitherP, endBy1, eof,
+       (ParseError, Parsec, (<?>), (<|>), anySingle, between, choice, 
+        eitherP, endBy1, eof, errorBundlePretty,
         lookAhead, many, option, optional, parse, parseErrorPretty, sepBy,
         sepBy1, skipManyTill, some, takeWhile1P, takeWhileP, try,
         withRecovery)
@@ -91,7 +91,7 @@ rawSentsC sent = between ws eof (e `endBy1` lineFeed)
     e = withRecovery recover (Right <$> sent)
     recover err =
       Left err <$
-      skipManyTill anyChar
+      skipManyTill anySingle
       -- if parser consumes the first newline but can't parse the
       -- second, it breaks; it can't consume the second one, because
       -- that one has to be consumed by the endBy1
@@ -393,7 +393,7 @@ parseConlluWith
 -- | parse a CoNLL-U document using a customized parser.
 parseConlluWith p fp s =
   case parse doc fp s of
-    Left err -> Left $ parseErrorPretty err
+    Left err -> Left $ errorBundlePretty err
     Right d ->
       let (ls, rs) = partitionEithers d
       in if null ls

stack.yaml

@@ -15,7 +15,7 @@
 # resolver:
 #  name: custom-snapshot
 #  location: "./custom-snapshot.yaml"
-resolver: lts-10.3
+resolver: lts-13.12
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.
@@ -63,4 +63,4 @@ packages:
 # extra-lib-dirs: [/path/to/dir]
 #
 # Allow a newer minor version of GHC than the snapshot specifies
-# compiler-check: newer-minor
+# compiler-check: newer-minor