Adds darwin ARM build to travis-ci.

Author: cbergoon

.travis.yml

@@ -65,6 +65,7 @@ deploy:
       - cli/build/migrate.linux-armv7.tar.gz
       - cli/build/migrate.linux-arm64.tar.gz
       - cli/build/migrate.darwin-amd64.tar.gz
+      - cli/build/migrate.darwin-arm64.tar.gz
       - cli/build/migrate.windows-amd64.exe.tar.gz
       - cli/build/migrate.windows-386.exe.tar.gz
       - cli/build/sha256sum.txt