Merge branch 'test/task3' into 'master'

...ntegration/2-advanced-examples/spies_stubs_clocks.spec.js

...cypress/integration/2-advanced-examples/traversal.spec.js

...cypress/integration/2-advanced-examples/utilities.spec.js

.../cypress/integration/2-advanced-examples/viewport.spec.js

...d/cypress/integration/2-advanced-examples/waiting.spec.js

...nd/cypress/integration/2-advanced-examples/window.spec.js

frontend/cypress/integration/FR5_spec.js

frontend/cypress/integration/edit_exercise_spec.js

frontend/cypress/integration/integration_test_spec.js

frontend/cypress/integration/register_spec.js

frontend/cypress/integration/sample_spec.js

frontend/cypress/integration/two_way_domain_spec.js

frontend/cypress/plugins/index.js

frontend/cypress/support/commands.js

frontend/cypress/support/index.js

frontend/package-lock.json

frontend/package.json