bump python-ecobee-api version to 0.0.18

[geekofweek]

Description:

Bump python-ecobee-api version to 0.0.18

This resolved an issue caused by a Typo that prevented Ecobee from utilizing nextTransition when setting a hold mode or temperature.

Related issue (if applicable): fixes #

nkgilley/python-ecobee-api#33

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If the code communicates with devices, web services, or third-party tools:

• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.

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