core/txpool: use right type for field Txs in NewTxsEvent#1897

AnilChinchawale merged 1 commit intoXinFinOrg:dev-upgradeXinFinOrg/XDPoSChain:dev-upgradefrom

gzliudan:fix-promoteSpecialTxgzliudan/XDPoSChain:fix-promoteSpecialTxCopy head branch name to clipboard