Fixed travis deps

.travis.yml

@@ -1,8 +1,19 @@
-language: c
+language: objective-c
+
+env:
+  global:
+    - EnableNuGetPackageRestore=true
+    # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
+    #   via the "travis encrypt" command using the project repo's public key
+    - secure: "kC7O0CWm9h4g+tzCwhIZEGwcdiLrb1/1PijeOKGbIWGuWS7cIksAkj2tRNMgtxxcE9CFQr8W7xDv2YzflCIlqN1nGkFjbyD4CrNg6+V1j0fZjPOQ6ssdBBVPrfrvecsAUJ0/48Tqa9VTkEpZSlwOF/VS1sO2ob36FVyWjtxvG9s="
+
+  matrix:
+    - MONO_VERSION="3.10.0"
 
 install:
-  - sudo apt-get install mono-devel mono-gmcs nunit-console
+  # Fetch Mono
+  - wget "http://download.mono-project.com/archive/${MONO_VERSION}/macos-10-x86/MonoFramework-MDK-${MONO_VERSION}.macos10.xamarin.x86.pkg"
+  - sudo installer -pkg "MonoFramework-MDK-${MONO_VERSION}.macos10.xamarin.x86.pkg" -target /
 
 script:
-  - xbuild travis.proj
-
+  - xbuild travis.proj