Merge pull request #67 from pj8/memcached #141

Job	Run time
test (macos-latest, mongodb-4.4.10.sh)	31s
test (macos-latest, mongodb-5.0.3.sh)	40s
test (macos-latest, mysql-5.7.31.sh)	38s
test (macos-latest, mysql-8.0.30.sh)	33s
test (macos-latest, postgresql-12.4.sh)	23s
test (macos-latest, postgresql-13.2.sh)	26s
test (macos-latest, redis-6.2.14.sh)	31s
test (macos-latest, redis-7.2.5.sh)	51s
test (macos-latest, memcached-1.6.31.sh)	1m 1s
test (ubuntu-latest, mongodb-4.4.10.sh)	17s
test (ubuntu-latest, mongodb-5.0.3.sh)	19s
test (ubuntu-latest, mysql-5.7.31.sh)	34s
test (ubuntu-latest, mysql-8.0.30.sh)	28s
test (ubuntu-latest, postgresql-12.4.sh)	3m 8s
test (ubuntu-latest, postgresql-13.2.sh)	3m 19s
test (ubuntu-latest, redis-6.2.14.sh)	1m 27s
test (ubuntu-latest, redis-7.2.5.sh)	1m 57s
test (ubuntu-latest, memcached-1.6.31.sh)	1m 11s
	18m 14s

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