[v1.3] Total Tasks in task route

[brunoocasali]

⚠️ This issue is generated, it means the examples and the namings do not necessarily correspond to the language of this repository.
Also, if you are a maintainer, please add any clarification and instructions about this issue.

Sorry if this is already wholly/partially implemented. Feel free to let me know about the state of this issue in the repo.

Related to meilisearch/integration-guides#280

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New implementation

Related to:

• spec: Tasks route total specifications#253

Returns the total number of tasks matching the filters on the GET /tasks route.

Ensure the SDKs can handle the new get tasks response field total

TODO:

• Handle the response of the getTasks method by including the new attribute total

[Sherlouk]

This was resolved under #425.