Fix version of crowdin-cli-ruby w Ruby<2.0 issue

Author: Wardormeur

circle.yml

@@ -7,7 +7,7 @@ dependencies:
   pre:
     - if [ "$CIRCLE_BRANCH" = "master" ]; then gem install mime-types -v 2.6.2; fi
     - if [ "$CIRCLE_BRANCH" = "master" ]; then gem install rest-client -v 1.8; fi
-    - if [ "$CIRCLE_BRANCH" = "master" ]; then gem install crowdin-cli; fi
+    - if [ "$CIRCLE_BRANCH" = "master" ]; then gem install crowdin-cli -v 0.5.5; fi
     - if [ "$CIRCLE_BRANCH" = "master" ]; then crowdin-cli upload sources; fi
     - if [ "$CIRCLE_BRANCH" = "master" ]; then for lang in it pt-PT de nl ro mt sl sk fr uk es-ES es-AR el pl et bg tr ja hi lt; do crowdin-cli download -l $lang; done; fi
   override: