Closes #1960 enhance derive_extreme_event() #2009

Job	Run time
Documentation	0s
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Check / (4.1)	7m 36s
Check / (4.2)	7m 40s
Check / (4.3)	7m 14s
Spelling / Get R version	2s
Code Style / Get R version	1s
Code Coverage / Get R version	1s
Links / Validate Links	5s
Lint / Get R version	1s
Man Pages / Get R version	2s
Lint / Lint	7m 59s
Code Style / Code Style	2m 50s
Man Pages / Roxygen	2m 48s
Spelling / Spellcheck	2m 21s
Code Coverage / Test Coverage	5m 40s
Code Coverage / Generate badge for coverage	4s
	44m 24s

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