Update Robolectric to 3.3.2 and AssertJ to 3.6.2

[nikitin-da]

Fixes robolectric/robolectric#2677
Update AssertJ because Robolectic already bump his version

Changelogs
Robolectric: https://github.com/robolectric/robolectric/releases
AssertJ: http://joel-costigliola.github.io/assertj/assertj-news.html
AssertJ Android: https://github.com/square/assertj-android/releases
Mockito: https://github.com/mockito/mockito/blob/release/2.x/doc/release-notes/official.md

[codecov-io]

Codecov Report

Merging #774 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #774   +/-   ##
=======================================
  Coverage   96.85%   96.85%           
=======================================
  Files          87       87           
  Lines        2638     2638           
  Branches      296      296           
=======================================
  Hits         2555     2555           
  Misses         50       50           
  Partials       33       33

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[geralt-encore]

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