.travis.yml in tee_logger-2.6.0 vs .travis.yml in tee_logger-2.7.0

- old
+ new
@@ -3,5 +3,8 @@
   - ruby-head
   - 2.2.2
   - 2.1.5
   - 2.0.0
 before_install: gem install bundler -v 1.10.4
+notifications:
+  slack:
+    secure: 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