Upgrade python-digitalocean to 1.13.2

[fabaff]

Description:

Changelog: https://github.com/koalalorenzo/python-digitalocean/commits/master

Example entry for configuration.yaml (if applicable):

digital_ocean:
  access_token: !secret do_api
binary_sensor:
  - platform: digital_ocean
    droplets:

Checklist:

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

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.