Try to fix Travis build

Author: geanders

.travis.yml

@@ -13,8 +13,13 @@ before_script:
 script:
 - ./_build.sh
 - ./_deploy.sh
+r_binary_packages:
+  - rgdal
+  - sp
+  - rgeos
+  - feather
 r_github_packages:
-  - hadley/ggplot2
-  - hadley/tidyverse
   - dkahle/ggmap
   - pbiecek/archivist
+  - cran/survival
+  - cran/bindrcpp