added test for cubic congestion control #17

Job	Run time
docs	19s
lint	18s
package-source	10s
Check for spelling errors	8s
package-wheel (macos-latest, arm64)	2m 10s
test (ubuntu-latest, 3.12)	1m 1s
package-wheel (macos-latest, x86_64)	13m 20s
test (ubuntu-latest, 3.11)	57s
package-wheel (ubuntu-latest, aarch64)	25m 40s
test (ubuntu-latest, 3.10)	1m 2s
package-wheel (ubuntu-latest, i686)	1m 20s
package-wheel (ubuntu-latest, x86_64)	5m 7s
test (ubuntu-latest, 3.9)	56s
package-wheel (windows-latest, AMD64)	10m 52s
test (ubuntu-latest, 3.8)	1m 1s
package-wheel (windows-latest, x86)	3m 26s
test (macos-latest, 3.12)	1m 11s
test (macos-latest, 3.11)	1m 19s
test (macos-latest, 3.10)	1m 14s
test (macos-latest, 3.9)	1m 14s
test (macos-latest, 3.8)	1m 13s
test (windows-latest, 3.12)	3m 51s
test (windows-latest, 3.11)	3m 25s
test (windows-latest, 3.10)	3m 23s
test (windows-latest, 3.9)	3m 27s
test (windows-latest, 3.8)	3m 52s
publish	28s
	1h 32m 24s

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