Fix travis config warnings. Fixes #23 (#24)

Co-authored-by: cmccarthy1 <[email protected]>

.travis.yml

@@ -1,4 +1,4 @@
-matrix:
+jobs:
   include:
   - dist: xenial
     os: linux
@@ -10,6 +10,8 @@ matrix:
   - os: windows
 language: c
 compiler: gcc
+os: linux
+dist: xenial
 
 before_install:
   - export FILE_ROOT="hdf5"
@@ -91,12 +93,12 @@ script:
 
 deploy:
   provider: releases
-  api_key: "$GITHUB_APIKEY"
+  token: "$GITHUB_APIKEY"
   file: "$FILE_NAME"
   on:
     tags: true
     condition: $TRAVIS_OS_NAME = windows || $TRAVIS_OS_NAME = osx || ($TRAVIS_DIST = trusty && $TRAVIS_OS_NAME = linux) 
-  skip_cleanup: 'true'
+  cleanup: 'false'
 
 notifications:
   slack: