Update mockito monorepo to v2.28.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.mockito:mockito-junit-jupiter	2.27.0 -> 2.28.2
org.mockito:mockito-core	2.27.0 -> 2.28.2

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Release Notes

mockito/mockito (org.mockito:mockito-junit-jupiter)

v2.28.2

^{Release notes were automatically generated by Shipkit}

2.28.2

• 2019-05-29 - 1 commit by Tim van der Lippe - published to
• No pull requests referenced in commit messages.

v2.28.1

^{Release notes were automatically generated by Shipkit}

2.28.1

• 2019-05-28 - 1 commit by Tim van der Lippe - published to
• No pull requests referenced in commit messages.

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