Merge #282

282: Fix installing dateutil since it is now a dependency of the GHP import script r=adamgreig a=eldruin

This fixes the publication even though still running on Travis CI.
See #280 

Co-authored-by: Diego Barrios Romero <eldruin@gmail.com>

ci/install.sh

@@ -11,6 +11,7 @@ main() {
  curl -LSfs https://japaric.github.io/trust/install.sh | \
  sh -s -- --git rust-lang/mdbook --tag $tag
 
+ pip install python-dateutil --user
  pip install linkchecker --user
 }