use latest dotnet core

Eirik Tsarpalis · Eirik Tsarpalis · commit 90b2374e8b1d · 2018-02-27T15:47:12.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,10 +6,10 @@ matrix:
       dist: trusty
       sudo: false
       mono: latest
-      dotnet: 2.0.0
+      dotnet: latest
     - os: osx # OSX 10.12
       osx_image: xcode9.1
-      dotnet: 2.0.0
+      dotnet: latest
       dist: trusty
       mono: latest
       sudo: false
