chore(deps-dev): bump apollo-server-koa from 3.6.7 to 3.12.1 #6744

Job	Run time
lint (18.x)	3m 45s
test-core (18.x)	3m 10s
test-graphql (18.x)	3m 55s
test-integration (ubuntu-latest, 16.x)	3m 59s
test-orm (18.x)	3m 35s
test-platform (18.x)	3m 11s
test-integration (ubuntu-latest, 18.x)	4m 6s
test-integration (ubuntu-latest, 19.x)	4m 20s
test-security (18.x)	3m 20s
test-integration (macos-latest, 18.x)	5m 53s
test-specs (18.x)	3m 54s
test-integration (windows-latest, 18.x)	17m 22s
test-formio (18.x)	3m 34s
test-third-parties (18.x)	4m 3s
deploy-packages	0s
publish-docs	0s
	1h 8m 7s

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