chore: set default value of ssl_verify to true #229

Job	Run time
build (ubuntu-latest, linux_openresty, t/admin t/cli t/config-center-yaml t/control t/core t/debu...	13m 52s
build (ubuntu-latest, linux_openresty, t/node t/pubsub t/router t/script t/secret t/stream-node t...	29m 43s
build (ubuntu-latest, linux_openresty, t/plugin/[a-k]*.t)	1h 30m 16s
build (ubuntu-latest, linux_openresty, t/stream-plugin t/plugin/[l-z]*.t)	1h 30m 17s
	3h 44m 8s

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