chore: update requires to 2.20.0 #171
                
     Merged
            
            
          
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What this PR does?
将 requires 改动到 2.20.0
目前 Halo 2.20.0 已经发布,此 #167 功能需要在 2.20.0 才能完整工作,因此升级到此版本后准备发版