fix(ci): fix builds of puppeteer@next (#4257)

Regenerated key with

```sh
travis encrypt <KEY> --add deploy.api_key --com --repo GoogleChrome/puppeteer
```

.travis.yml

@@ -36,7 +36,7 @@ deploy:
   provider: npm
   email: aslushnikov@gmail.com
   api_key:
-    secure: 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
+    secure: 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
   on:
     branch: master
     condition: "$NODE8 = true"