Test with GHC 8.0.1 on travis

Author: Johan Tibell

.travis.yml

@@ -25,6 +25,9 @@ matrix:
     - env: CABALVER=1.22 GHCVER=7.10.3
       compiler: ": #GHC 7.10.3"
       addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}
+    - env: CABALVER=1.24 GHCVER=8.0.1
+      compiler: ": #GHC 8.0.1"
+      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1], sources: [hvr-ghc]}}
 
 before_install:
  - unset CC

unordered-containers.cabal

@@ -20,7 +20,7 @@ category:       Data
 build-type:     Simple
 cabal-version:  >=1.8
 extra-source-files: CHANGES.md
-tested-with:    GHC==7.10.3, GHC==7.8.4, GHC==7.6.3, GHC==7.4.2
+tested-with:    GHC==8.0.1, GHC==7.10.3, GHC==7.8.4, GHC==7.6.3, GHC==7.4.2
 
 flag debug
   description:  Enable debug support