optimize: upgrade alibaba/druid version to 1.2.20 #6523
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Ⅰ. Describe what this PR did
将 alibaba/druid的版本从1.2.7升级到1.2.20
upgrade alibaba/druid version from 1.2.7 to 1.2.20
Ⅱ. Does this pull request fix one issue?
fixes #6522
Ⅲ. Why don't you add test cases (unit test/integration test)?
Ⅳ. Describe how to verify it
Ⅴ. Special notes for reviews