Bump python-synology to 0.4.0 : Add support for DSM v5 + fix sensors unknown for 15 min

[aaska]

Description:

Updated python-synology component to allow backward compatibility with Synology DSM 5.x

Example entry for configuration.yaml (if applicable):

sensor:
  - platform: synologydsm
    host: 192.168.0.2
    port: 5001
    api_version: 5
    username: username
    password: password
    monitored_conditions:
      - disk_name
      - disk_device
      - disk_smart_status

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io - Update synologydsm.markdown home-assistant.io#11833

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

• The manifest file has all fields filled out correctly. Update and include derived files by running python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[springstan]

@aaska please update the documentation accordingly :)

[aaska]

@springstan I'm a bit confused. I updated the documentation with this PR home-assistant/home-assistant.io#11833
Am I missing something ? Thank you !

[springstan]

Oh I am sorry did not see that 😅 please add a link to it in your PR description.

[aaska]

Added the link in the description ! Sorry for the confusion :) Thank you !

[Quentame]

Just need a little test about the delay of the availability of the sensors on 5.2 and 6.2 before merging.

PS : I'll take care of your modifiations on my Synology DSM refactor : "Add config flow to Synology DSM" #31030, don't hesitate to take a look.