Upgrade mypy to latest upstream git.
Upgrade mypy to latest upstream git.

This new mypy version supports some performance improvements and
should also facilitate running mypy on our scripts more efficiently.

souravbadami/zulip,dattatreya303/zulip,reyha/zulip,dawran6/zulip,PhilSk/zulip,sonali0901/zulip,christi3k/zulip,zacps/zulip,eeshangarg/zulip,zulip/zulip,sonali0901/zulip,cosmicAsymmetry/zulip,mohsenSy/zulip,showell/zulip,grave-w-grave/zulip,synicalsyntax/zulip,AZtheAsian/zulip,timabbott/zulip,shubhamdhama/zulip,JPJPJPOPOP/zulip,zulip/zulip,rht/zulip,SmartPeople/zulip,TigorC/zulip,brainwane/zulip,samatdav/zulip,AZtheAsian/zulip,j831/zulip,amyliu345/zulip,jainayush975/zulip,punchagan/zulip,eeshangarg/zulip,amanharitsh123/zulip,dawran6/zulip,paxapy/zulip,showell/zulip,tommyip/zulip,ryanbackman/zulip,timabbott/zulip,Juanvulcano/zulip,zulip/zulip,joyhchen/zulip,kou/zulip,brockwhittaker/zulip,ahmadassaf/zulip,peguin40/zulip,aakash-cr7/zulip,KingxBanana/zulip,amyliu345/zulip,christi3k/zulip,Diptanshu8/zulip,zulip/zulip,punchagan/zulip,sup95/zulip,PhilSk/zulip,showell/zulip,reyha/zulip,umkay/zulip,vaidap/zulip,jrowan/zulip,isht3/zulip,mahim97/zulip,Galexrt/zulip,amanharitsh123/zulip,amyliu345/zulip,hackerkid/zulip,JPJPJPOPOP/zulip,JPJPJPOPOP/zulip,kou/zulip,calvinleenyc/zulip,niftynei/zulip,dattatreya303/zulip,shubhamdhama/zulip,souravbadami/zulip,cosmicAsymmetry/zulip,joyhchen/zulip,niftynei/zulip,TigorC/zulip,susansls/zulip,vaidap/zulip,Juanvulcano/zulip,TigorC/zulip,sup95/zulip,vikas-parashar/zulip,krtkmj/zulip,zacps/zulip,rishig/zulip,grave-w-grave/zulip,grave-w-grave/zulip,ryanbackman/zulip,ahmadassaf/zulip,mahim97/zulip,shubhamdhama/zulip,sharmaeklavya2/zulip,Galexrt/zulip,joyhchen/zulip,rishig/zulip,amanharitsh123/zulip,dattatreya303/zulip,kou/zulip,sonali0901/zulip,TigorC/zulip,timabbott/zulip,zulip/zulip,andersk/zulip,dhcrzf/zulip,rishig/zulip,brainwane/zulip,dattatreya303/zulip,zacps/zulip,Diptanshu8/zulip,jrowan/zulip,shubhamdhama/zulip,KingxBanana/zulip,krtkmj/zulip,synicalsyntax/zulip,brockwhittaker/zulip,PhilSk/zulip,andersk/zulip,andersk/zulip,kou/zulip,vaidap/zulip,krtkmj/zulip,j831/zulip,jphilipsen05/zulip,calvinleenyc/zulip,mohsenSy/zulip,mohsenSy/zulip,isht3/zulip,arpith/zulip,samatdav/zulip,showell/zulip,brainwane/zulip,rishig/zulip,dhcrzf/zulip,aakash-cr7/zulip,jackrzhang/zulip,vikas-parashar/zulip,zulip/zulip,arpith/zulip,Galexrt/zulip,sup95/zulip,reyha/zulip,showell/zulip,ahmadassaf/zulip,mohsenSy/zulip,SmartPeople/zulip,dhcrzf/zulip,vabs22/zulip,andersk/zulip,eeshangarg/zulip,ahmadassaf/zulip,umkay/zulip,umkay/zulip,JPJPJPOPOP/zulip,cosmicAsymmetry/zulip,shubhamdhama/zulip,Jianchun1/zulip,PhilSk/zulip,reyha/zulip,brainwane/zulip,dattatreya303/zulip,sonali0901/zulip,isht3/zulip,Diptanshu8/zulip,krtkmj/zulip,jphilipsen05/zulip,SmartPeople/zulip,niftynei/zulip,dawran6/zulip,jphilipsen05/zulip,dhcrzf/zulip,umkay/zulip,vaidap/zulip,jainayush975/zulip,calvinleenyc/zulip,tommyip/zulip,JPJPJPOPOP/zulip,rht/zulip,shubhamdhama/zulip,jphilipsen05/zulip,ryanbackman/zulip,blaze225/zulip,PhilSk/zulip,shubhamdhama/zulip,rishig/zulip,calvinleenyc/zulip,brockwhittaker/zulip,paxapy/zulip,vabs22/zulip,peguin40/zulip,tommyip/zulip,AZtheAsian/zulip,jackrzhang/zulip,sup95/zulip,christi3k/zulip,punchagan/zulip,verma-varsha/zulip,TigorC/zulip,jphilipsen05/zulip,amyliu345/zulip,niftynei/zulip,eeshangarg/zulip,mahim97/zulip,arpith/zulip,Jianchun1/zulip,mahim97/zulip,dhcrzf/zulip,Galexrt/zulip,zacps/zulip,Diptanshu8/zulip,jrowan/zulip,vikas-parashar/zulip,peguin40/zulip,aakash-cr7/zulip,ryanbackman/zulip,AZtheAsian/zulip,christi3k/zulip,Juanvulcano/zulip,jackrzhang/zulip,jrowan/zulip,souravbadami/zulip,cosmicAsymmetry/zulip,zacps/zulip,timabbott/zulip,grave-w-grave/zulip,Jianchun1/zulip,vaidap/zulip,blaze225/zulip,hackerkid/zulip,aakash-cr7/zulip,dhcrzf/zulip,aakash-cr7/zulip,souravbadami/zulip,punchagan/zulip,TigorC/zulip,sharmaeklavya2/zulip,sonali0901/zulip,verma-varsha/zulip,jackrzhang/zulip,mohsenSy/zulip,umkay/zulip,punchagan/zulip,jainayush975/zulip,j831/zulip,jphilipsen05/zulip,hackerkid/zulip,jainayush975/zulip,kou/zulip,reyha/zulip,dattatreya303/zulip,synicalsyntax/zulip,SmartPeople/zulip,showell/zulip,rht/zulip,paxapy/zulip,blaze225/zulip,brainwane/zulip,samatdav/zulip,joyhchen/zulip,brockwhittaker/zulip,Diptanshu8/zulip,KingxBanana/zulip,arpith/zulip,hackerkid/zulip,j831/zulip,Jianchun1/zulip,SmartPeople/zulip,samatdav/zulip,Galexrt/zulip,krtkmj/zulip,hackerkid/zulip,Juanvulcano/zulip,zacps/zulip,umkay/zulip,vikas-parashar/zulip,JPJPJPOPOP/zulip,j831/zulip,mahim97/zulip,rht/zulip,amanharitsh123/zulip,susansls/zulip,vikas-parashar/zulip,vikas-parashar/zulip,jackrzhang/zulip,showell/zulip,tommyip/zulip,hackerkid/zulip,samatdav/zulip,grave-w-grave/zulip,brockwhittaker/zulip,jainayush975/zulip,mahim97/zulip,vabs22/zulip,joyhchen/zulip,tommyip/zulip,isht3/zulip,synicalsyntax/zulip,eeshangarg/zulip,umkay/zulip,zulip/zulip,paxapy/zulip,jainayush975/zulip,blaze225/zulip,j831/zulip,KingxBanana/zulip,peguin40/zulip,timabbott/zulip,verma-varsha/zulip,dawran6/zulip,synicalsyntax/zulip,SmartPeople/zulip,jrowan/zulip,Juanvulcano/zulip,sup95/zulip,rht/zulip,synicalsyntax/zulip,AZtheAsian/zulip,susansls/zulip,peguin40/zulip,rht/zulip,sharmaeklavya2/zulip,isht3/zulip,tommyip/zulip,vabs22/zulip,aakash-cr7/zulip,dhcrzf/zulip,rht/zulip,isht3/zulip,paxapy/zulip,arpith/zulip,tommyip/zulip,reyha/zulip,Juanvulcano/zulip,vabs22/zulip,vabs22/zulip,PhilSk/zulip,andersk/zulip,brainwane/zulip,susansls/zulip,blaze225/zulip,blaze225/zulip,amyliu345/zulip,souravbadami/zulip,rishig/zulip,sharmaeklavya2/zulip,joyhchen/zulip,arpith/zulip,souravbadami/zulip,calvinleenyc/zulip,krtkmj/zulip,brainwane/zulip,peguin40/zulip,mohsenSy/zulip,Galexrt/zulip,christi3k/zulip,ryanbackman/zulip,kou/zulip,sharmaeklavya2/zulip,vaidap/zulip,grave-w-grave/zulip,krtkmj/zulip,eeshangarg/zulip,amyliu345/zulip,samatdav/zulip,kou/zulip,Jianchun1/zulip,niftynei/zulip,christi3k/zulip,amanharitsh123/zulip,dawran6/zulip,ahmadassaf/zulip,paxapy/zulip,andersk/zulip,calvinleenyc/zulip,punchagan/zulip,hackerkid/zulip,AZtheAsian/zulip,Jianchun1/zulip,niftynei/zulip,amanharitsh123/zulip,andersk/zulip,susansls/zulip,KingxBanana/zulip,synicalsyntax/zulip,timabbott/zulip,sup95/zulip,verma-varsha/zulip,verma-varsha/zulip,rishig/zulip,susansls/zulip,Galexrt/zulip,dawran6/zulip,cosmicAsymmetry/zulip,eeshangarg/zulip,timabbott/zulip,cosmicAsymmetry/zulip,jackrzhang/zulip,jrowan/zulip,jackrzhang/zulip,brockwhittaker/zulip,ahmadassaf/zulip,ryanbackman/zulip,ahmadassaf/zulip,KingxBanana/zulip,sonali0901/zulip,verma-varsha/zulip,sharmaeklavya2/zulip,punchagan/zulip,Diptanshu8/zulip