update to use nfpm instead of fpm for packaging

Author: sofixa

.travis.yml

@@ -17,6 +17,6 @@ before_script:
 script:
   - git status
 after_success:
-  - gem install --no-ri --no-rdoc fpm
+#  - gem install --no-ri --no-rdoc fpm
   - test -n "$TRAVIS_TAG" && curl -sL https://git.io/goreleaser | bash
 

goreleaser.yml

@@ -19,7 +19,7 @@ archive:
   files:
     - LICENSE.txt
     - README.md
-fpm:
+nfpm:
   # Your app's vendor.
   # Default is empty.
   vendor: Oxalide