Update minimum support boto version.
Update minimum support boto version.

boto 2.20.0 introduces kinesis.  alternatively, this requirement could be
relaxed by using conditional imports.

botify-labs/moto,okomestudio/moto,dbfr3qs/moto,whummer/moto,dbfr3qs/moto,behanceops/moto,zonk1024/moto,2rs2ts/moto,2rs2ts/moto,heddle317/moto,pior/moto,gjtempleton/moto,dbfr3qs/moto,spulec/moto,alexdebrie/moto,tootedom/moto,william-richard/moto,rocky4570/moto,whummer/moto,riccardomc/moto,spulec/moto,kefo/moto,heddle317/moto,spulec/moto,2rs2ts/moto,william-richard/moto,braintreeps/moto,Brett55/moto,Brett55/moto,gjtempleton/moto,kefo/moto,ZuluPro/moto,gjtempleton/moto,botify-labs/moto,rocky4570/moto,Affirm/moto,spulec/moto,rouge8/moto,Affirm/moto,araines/moto,spulec/moto,rocky4570/moto,heddle317/moto,rocky4570/moto,botify-labs/moto,okomestudio/moto,ZuluPro/moto,kefo/moto,ZuluPro/moto,kefo/moto,dbfr3qs/moto,dbfr3qs/moto,william-richard/moto,im-auld/moto,okomestudio/moto,okomestudio/moto,ZuluPro/moto,Brett55/moto,Affirm/moto,2rs2ts/moto,botify-labs/moto,Affirm/moto,rocky4570/moto,whummer/moto,ImmobilienScout24/moto,silveregg/moto,ZuluPro/moto,Brett55/moto,IlyaSukhanov/moto,jotes/moto,Brett55/moto,kennethd/moto,2rs2ts/moto,whummer/moto,whummer/moto,william-richard/moto,okomestudio/moto,rocky4570/moto,ludia/moto,okomestudio/moto,Affirm/moto,heddle317/moto,Affirm/moto,dbfr3qs/moto,heddle317/moto,spulec/moto,Brett55/moto,botify-labs/moto,gjtempleton/moto,botify-labs/moto,william-richard/moto,mrucci/moto,ZuluPro/moto,kefo/moto,whummer/moto,jrydberg/moto,gjtempleton/moto,william-richard/moto,2mf/moto,EarthmanT/moto,jszwedko/moto