update travis

Author: emilypi

.travis.yml

@@ -33,6 +33,9 @@ before_cache:
   - rm -rfv $CABALHOME/packages/head.hackage
 jobs:
   include:
+    - compiler: ghc-8.10.2
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.10.2","cabal-install-3.2"]}}
+      os: linux
     - compiler: ghc-8.10.1
       addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.10.1","cabal-install-3.2"]}}
       os: linux