Fix RxJS@7 deprecations

[andrevmatos]

Description

The latest major RxJS version is 7, which we're using, but they've recently merged a few deprecations in order to simplify their operator's set taking effect mostly on future RxjS@9, which is long in the future. Nonetheless, it's sane for us to implement the deprecation's alternatives, as they're simple enough and mostly map 1:1 with our current usage.

e.g.:

mapTo(value), // to
map(() => value), // or
map(constant(value)), // lodash's constant

Acceptance criteria

• No more RxJS deprecation's warnings on codebase

Tasks

• [ ]

Why do this?

Deprecated operator functions can be replaced with other functions to ensure future compatibility.