Closes #1960 enhance derive_extreme_event() #2002

Job	Run time
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Check / (4.1)	6m 54s
Check / (4.2)	5m 58s
Check / (4.3)	6m 8s
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Code Coverage / Test Coverage	4m 31s
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Man Pages / Roxygen	2m 19s
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	38m 23s

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