Update fs2-core, fs2-core_2.13 to 3.9.3 #1249

Job	Run time
bincompat	4m 2s
integration-tests (ubuntu-20.04)	23s
format	23s
integration-tests (macos-latest)	43s
examples (ubuntu-latest)	3m 14s
publishLocal	20m 40s
integration-tests (windows-latest)	35s
examples (windows-latest)	5m 18s
test (ubuntu-latest, 8, 2.12.17)	3m 20s
test (ubuntu-latest, 8, 2.12.18)	2m 51s
website	1m 54s
test (ubuntu-latest, 8, 2.13.11)	4m 29s
test (ubuntu-latest, 8, 2.13.12)	2m 49s
test (ubuntu-latest, 8, 3.3.0)	4m 18s
test (windows-latest, 8, 2.13.12)	4m 1s
test (macos-latest, 8, 2.13.12)	4m 55s
test (ubuntu-latest, 17, 2.12.18)	4m 12s
all-tests	0s
	1h 8m 7s

Provide feedback