update .travis.yml

Author: tobozo

.travis.yml

@@ -112,7 +112,7 @@ deploy:
       - "/tmp/BLECollector-binaries/M5stack-BLECollector.bin"
       - "/tmp/BLECollector-binaries/OdroidGo-BLECollector.bin"
       - "/tmp/BLECollector-binaries/M5Fire-BLECollector.bin"
-    #skip_cleanup: true
+    skip_cleanup: true
     # draft: true
     on:
       branch: unstable