TASK: Update dependency redux-saga-test-plan to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
redux-saga-test-plan	3.7.0 -> 4.0.6

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Release Notes

jfairbank/redux-saga-test-plan (redux-saga-test-plan)

v4.0.6

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• Remove deprecated core-js [#​388]https://github.com/jfairbank/redux-saga-test-plan/pull/388

v4.0.5

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• Fix the typescript 4.* type definition issue [#​387]https://github.com/jfairbank/redux-saga-test-plan/pull/387

v4.0.4

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• Fix the issue [#​278]https://github.com/jfairbank/redux-saga-test-plan/issues/278 [#​377]https://github.com/jfairbank/redux-saga-test-plan/pull/377

v4.0.3

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• Fix peer dependencies [#​370]https://github.com/jfairbank/redux-saga-test-plan/pull/370

v4.0.2

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• Add peer dependencies [#​369]https://github.com/jfairbank/redux-saga-test-plan/pull/369

v4.0.1

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• Remove package-lock.json

v4.0.0

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• Retry helper support #​354
• Drop support on Node 8 downward
• Fix typescript issues #​357 #​358 #​361 #​354 #​350 #​343 #​313
• Update babel 7

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