Regenerate .travis.yml

This commit was performed automatically by a script.
https://github.com/RyanGlScott/travis-maintenance

Author: RyanGlScott

.travis.yml

@@ -36,9 +36,9 @@ before_cache:
 
 matrix:
   include:
-    - compiler: "ghc-8.6.1"
+    - compiler: "ghc-8.6.2"
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.6.1], sources: [hvr-ghc]}}
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.6.2], sources: [hvr-ghc]}}
     - compiler: "ghc-8.4.4"
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.4.4], sources: [hvr-ghc]}}

mtl.cabal

@@ -25,7 +25,7 @@ tested-with:
   GHC==8.0.2,
   GHC==8.2.2,
   GHC==8.4.4,
-  GHC==8.6.1
+  GHC==8.6.2
 
 source-repository head
   type: git