chore(deps): update dependency org.mockito:mockito-core to v3.12.4

This MR contains the following updates:

Package	Update	Change
org.mockito:mockito-core	patch	3.12.1 -> 3.12.4

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Release Notes

mockito/mockito

v3.12.4

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3.12.4

• 2021-08-25 - 1 commit(s) by Rafael Winterhalter
• No notable improvements. No pull requests (issues) were referenced from commits.

v3.12.3

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3.12.3

• 2021-08-24 - 9 commit(s) by Rafael Winterhalter
• Fix implementation of proxy mock maker for toString and add additional unit tests. (#​2405)
• Avoid cache breakage (#​2402)
• Add a limited mock maker that is based only on the java.lang.reflect.Proxy utility (#​2397)

v3.12.2

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3.12.2

• 2021-08-24 - 2 commit(s) by Dmitry Vyazelenko, dependabot[bot]
• Fixes #​2399 : Adds defaultAnswer to the MockitoMockKey to distinguish the mock types, i.e. to separate mocks from spies otherwise spy type is reused for a mock or vice versa. (#​2400)
• Sporadic mock verification failures related to hashCode/equals on 3.12.1 (#​2399)
• Bump versions.errorprone from 2.8.1 to 2.9.0 (#​2396)

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