requirements: Upgrade pika to version 0.10.0.
requirements: Upgrade pika to version 0.10.0.

This is needed to fix RabbitMQ heartbeat issues that cause connections
to drop (#741).  It's also relevant for Python 3 support.

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