Update dependency pytype to v2021.2.19
Update dependency pytype to v2021.2.19

mwutzke/faucet,faucetsdn/faucet,mwutzke/faucet,REANNZ/faucet,REANNZ/faucet,anarkiwi/faucet,anarkiwi/faucet,faucetsdn/faucet