ci(circle): update config

[fulls1z3]

** PR Checklist Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/azure-seed/azure-functions-elasticizer/blob/master/CONTRIBUTING.md#commit
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

** PR Type What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[x] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

** What is the current behavior?

Issue Number: N/A

** What is the new behavior?

** Does this PR introduce a breaking change?

[ ] Yes
[x] No

** Other information

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@c56c30c). Click here to learn what that means. The diff coverage is n/a.

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  Files             ?        1           
  Lines             ?       82           
  Branches          ?       19           
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  Hits              ?       81           
  Misses            ?        1           
  Partials          ?        0

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