Add missing operators for uint and uint64: `+=`, `-=`, `*=`
Add missing operators for uint and uint64: `+=`, `-=`, `*=`

reactormonk/nim,msmith491/Nim,nafsaka/Nim,fredericksilva/Nim,xland/Nim,JCavallo/Nim,russpowers/Nim,fredericksilva/Nim,kirbyfan64/Nim,endragor/Nim,Dhertz/Nim,fmamud/Nim,gokr/Nim,sarvex/Nim-lang,mbaulch/Nim,xland/Nim,reactormonk/nim,JCavallo/Nim,zachaysan/Nim,singularperturbation/Nim,fmamud/Nim,bvssvni/Nim,mbaulch/Nim,singularperturbation/Nim,BlaXpirit/nim,judofyr/Nim,msmith491/Nim,Salafit/Nim,fredericksilva/Nim,Matt14916/Nim,bvssvni/Nim,haiodo/Nim,endragor/Nim,Senketsu/Nim,SSPkrolik/Nim,gokr/Nim,tulayang/Nim,jfhg/Nim,douglas-larocca/Nim,Senketsu/Nim,greyanubis/Nim,endragor/Nim,tmm1/Nim,nanoant/Nim,reactormonk/nim,fredericksilva/Nim,sarvex/Nim-lang,kirbyfan64/Nim,judofyr/Nim,russpowers/Nim,nimLuckyBull/Nim,zachaysan/Nim,endragor/Nim,mbaulch/Nim,nanoant/Nim,jfhg/Nim,SSPkrolik/Nim,mbaulch/Nim,SSPkrolik/Nim,judofyr/Nim,kirbyfan64/Nim,singularperturbation/Nim,SSPkrolik/Nim,nimLuckyBull/Nim,zachaysan/Nim,zachaysan/Nim,greyanubis/Nim,reactormonk/nim,BlaXpirit/nim,MrJohz/Nim,tulayang/Nim,nanoant/Nim,jsanjuas/Nim,reactormonk/nim,sferik/Nim,jfhg/Nim,nafsaka/Nim,BlaXpirit/nim,reactormonk/nim,tulayang/Nim,reactormonk/nim,fmamud/Nim,judofyr/Nim,Dhertz/Nim,haiodo/Nim,fmamud/Nim,xland/Nim,xland/Nim,bvssvni/Nim,xland/Nim,Dhertz/Nim,SSPkrolik/Nim,endragor/Nim,xland/Nim,sferik/Nim,xland/Nim,nimLuckyBull/Nim,MrJohz/Nim,douglas-larocca/Nim,JCavallo/Nim,Senketsu/Nim,singularperturbation/Nim,sferik/Nim,jfhg/Nim,endragor/Nim,Senketsu/Nim,gokr/Nim,zachaysan/Nim,endragor/Nim,msmith491/Nim,douglas-larocca/Nim,nanoant/Nim,tmm1/Nim,msmith491/Nim,SSPkrolik/Nim,greyanubis/Nim,gokr/Nim,sarvex/Nim-lang,tulayang/Nim,nafsaka/Nim,gokr/Nim,russpowers/Nim,reactormonk/nim,MrJohz/Nim,Matt14916/Nim,kirbyfan64/Nim,sferik/Nim,russpowers/Nim,JCavallo/Nim,tmm1/Nim,BlaXpirit/nim,dom96/Nim,greyanubis/Nim,fmamud/Nim,Senketsu/Nim,judofyr/Nim,Senketsu/Nim,douglas-larocca/Nim,russpowers/Nim,jfhg/Nim,judofyr/Nim,singularperturbation/Nim,msmith491/Nim,Salafit/Nim,Matt14916/Nim,BlaXpirit/nim,gokr/Nim,SSPkrolik/Nim,Dhertz/Nim,dom96/Nim,singularperturbation/Nim,MrJohz/Nim,dom96/Nim,jsanjuas/Nim,Dhertz/Nim,mbaulch/Nim,jfhg/Nim,gokr/Nim,Salafit/Nim,msmith491/Nim,douglas-larocca/Nim,greyanubis/Nim,mbaulch/Nim,zachaysan/Nim,jfhg/Nim,russpowers/Nim,sferik/Nim,nimLuckyBull/Nim,nimLuckyBull/Nim,Dhertz/Nim,JCavallo/Nim,jsanjuas/Nim,dom96/Nim,nafsaka/Nim,tulayang/Nim,kirbyfan64/Nim,dom96/Nim,SSPkrolik/Nim,bvssvni/Nim,kirbyfan64/Nim,fredericksilva/Nim,nanoant/Nim,nimLuckyBull/Nim,nafsaka/Nim,jsanjuas/Nim,dom96/Nim,kirbyfan64/Nim,Matt14916/Nim,nanoant/Nim,fredericksilva/Nim,gokr/Nim,Matt14916/Nim,jsanjuas/Nim,haiodo/Nim,tulayang/Nim,fmamud/Nim,MrJohz/Nim,tmm1/Nim,nanoant/Nim,greyanubis/Nim,JCavallo/Nim,tmm1/Nim,dom96/Nim,haiodo/Nim,Salafit/Nim,sarvex/Nim-lang,greyanubis/Nim,haiodo/Nim,Salafit/Nim,BlaXpirit/nim,Dhertz/Nim,Matt14916/Nim,fredericksilva/Nim,bvssvni/Nim,nafsaka/Nim,russpowers/Nim,Matt14916/Nim,sferik/Nim,singularperturbation/Nim,MrJohz/Nim,douglas-larocca/Nim,nimLuckyBull/Nim,msmith491/Nim,fredericksilva/Nim,judofyr/Nim,tmm1/Nim,mbaulch/Nim,jsanjuas/Nim,fmamud/Nim,jsanjuas/Nim,sferik/Nim,JCavallo/Nim,Salafit/Nim,haiodo/Nim,Salafit/Nim,sarvex/Nim-lang,douglas-larocca/Nim,haiodo/Nim,sarvex/Nim-lang,BlaXpirit/nim,Senketsu/Nim,bvssvni/Nim,kirbyfan64/Nim,sferik/Nim,MrJohz/Nim,judofyr/Nim,sarvex/Nim-lang,douglas-larocca/Nim,nafsaka/Nim,zachaysan/Nim,BlaXpirit/nim,tmm1/Nim,bvssvni/Nim