Merge pull request #34 from dten/ghc8.8

build with 8.8.1

Author: 23Skidoo

.travis.yml

@@ -26,6 +26,8 @@ before_cache:
   - rm -rfv $CABALHOME/packages/head.hackage
 matrix:
   include:
+    - compiler: ghc-8.8.1
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.8.1","cabal-install-3.0"]}}
     - compiler: ghc-8.6.5
       addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}
     - compiler: ghc-8.4.4

ekg-core.cabal

@@ -34,7 +34,7 @@ library
 
   build-depends:
     ghc-prim < 0.6,
-    base >= 4.6 && < 4.13,
+    base >= 4.6 && < 4.14,
     containers >= 0.5 && < 0.7,
     text < 1.3,
     unordered-containers < 0.3