Balena-sdk

* tests: Test that the result of device.getDeviceSlug() is a string [Thodoris Greasidis]
* tests: Run device.getDeviceBySlug() calls in parallel to speed up tests [Thodoris Greasidis]
* tests/os: Drop unnecessary beforeEach in getConfig() [Thodoris Greasidis]
* tests/application: Fix incorrect skipping of unauthenticated tests [Thodoris Greasidis]

* typings: Make ReleaseWithImageDetails more accurate [Thodoris Greasidis]
* Fully type the pine.get results [Thodoris Greasidis]
* typings: Add the PineTypedResult helper type [Thodoris Greasidis]

* Typings: Add organization member relation to tags [Thodoris Greasidis]

* Add typings for pine.getOrCreate() [Thodoris Greasidis]

<details>
<summary> Bump balena-pine to add getOrCreate [Thodoris Greasidis] </summary>

> balena-pine-12.4.0 - 2020-09-07
>
>
> <details>
> <summary> Update pinejs-client-core to 6.9.0 to support getOrCreate() [Thodoris Greasidis] </summary>
>
>> pinejs-client-js-6.9.0 - 2020-09-07
>>
>> * Add 'getOrCreate' method supporting natural keys [Thodoris Greasidis]
>>
>> pinejs-client-js-6.8.0 - 2020-09-03
>>
>> * Add support for $format [Pagan Gazzard]
>>
>> pinejs-client-js-6.7.3 - 2020-08-26
>>
>> * Improve $orderby typing to allow `[{a: 'desc'}, {b: 'asc'}]` [Pagan Gazzard]
>>
>> pinejs-client-js-6.7.2 - 2020-08-24
>>
>> * Update dev dependencies [Pagan Gazzard]
>>
>> pinejs-client-js-6.7.1 - 2020-08-12
>>
>> * Fix prepare $count typings [Pagan Gazzard]
>>
>> pinejs-client-js-6.7.0 - 2020-08-12
>>
>> * Improve typings for request/post/put/patch/delete [Pagan Gazzard]
>>
> </details>
>
>
</details>

* Add mocha tests specific linting [Thodoris Greasidis]
* Auto-fix lint errors with the test:fast script [Thodoris Greasidis]
* Add linting checks back to the test script [Thodoris Greasidis]

* Add a hostapps model for fetching OS versions [Stevche Radevski]