Add encrypted Github Token for releases

.travis.yml

@@ -11,7 +11,10 @@ install:
     && popd
 
 env:
+  matrix:
   - PATH=$HOME/protobuf/bin:$PATH
+  global:
+    secure: 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
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)
@@ -20,7 +23,7 @@ after_success:
 deploy:
   - provider: script
     skip_cleanup: true
-    script: curl -sL https://git.io/goreleaser | bash
+    script: make clean && curl -sL https://git.io/goreleaser | bash
     on:
       tags: true
       condition: $TRAVIS_OS_NAME = linux