Update heroku token on travis

[alexandrebarbaruiva]

Just updating heroku token on travis to avoid failing automated deploy

New Feature Submissions:

To run tests locally, use make if you're on Mac or Linux.

1. [ ] Does your submission pass all the tests?
2. [ ] Have you lint your code locally prior to submission?
3. [ ] Have you written proper tests to your added code?

New Dialog Submissions:

User messages have - -, bot messages have -

1. [ ] Does all your user messages have lower letters?
2. [ ] Have you lint your dialogs locally prior to submission?
3. [ ] Have you written proper tests to your added dialogs on test_dialogs?
4. [ ] Does your dialog have an existing category? If not, did you create it?

Changes to Core Features:

• [ ] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests or modified old ones for your core changes, as applicable?
• [ ] Have you successfully ran tests with your changes locally?

[codecov[bot]]

Codecov Report

Merging #30 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #30   +/-   ##
=======================================
  Coverage   80.48%   80.48%           
=======================================
  Files           2        2           
  Lines          82       82           
  Branches        1        1           
=======================================
  Hits           66       66           
  Misses         16       16

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