Update travis

.travis.yml

@@ -7,10 +7,12 @@ dist: trusty
 
 matrix:
   include:
-    - env: CABALVER=1.24 GHCVER=7.10.2
-      addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.2,libgtk2.0-dev,libgtk-3-dev], sources: [hvr-ghc]}}
     - env: CABALVER=1.24 GHCVER=8.0.1
-      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1,libgtk2.0-dev,libgtk-3-dev], sources: [hvr-ghc]}}
+      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1], sources: [hvr-ghc]}}
+    - env: CABALVER=2.0 GHCVER=8.2.2
+      addons: {apt: {packages: [cabal-install-2.0,ghc-8.2.2], sources: [hvr-ghc]}}
+    - env: CABALVER=2.2 GHCVER=8.4.1
+      addons: {apt: {packages: [cabal-install-2.2,ghc-8.4.1], sources: [hvr-ghc]}}
     - env: CABALVER=head GHCVER=head
       addons: {apt: {packages: [cabal-install-head,ghc-head,libgtk2.0-dev,libgtk-3-dev],  sources: [hvr-ghc]}}