Updating "JSX Gotchas" docs for Custom Attributes
Updating "JSX Gotchas" docs for Custom Attributes

Adds note that custom attributes are supported on custom elements.
mjackson/react,joecritch/react,maxschmeling/react,rickbeerendonk/react,shergin/react,linmic/react,linmic/react,yangshun/react,jontewks/react,miaozhirui/react,mhhegazy/react,dilidili/react,billfeller/react,miaozhirui/react,aickin/react,with-git/react,cpojer/react,DJCordhose/react,roth1002/react,pyitphyoaung/react,cody/react,STRML/react,tomocchino/react,flarnie/react,prometheansacrifice/react,miaozhirui/react,chicoxyzzy/react,microlv/react,ABaldwinHunter/react-engines,pyitphyoaung/react,anushreesubramani/react,niubaba63/react,silvestrijonathan/react,chicoxyzzy/react,dortonway/react,nickdima/react,quip/react,rricard/react,jorrit/react,AlmeroSteyn/react,AlmeroSteyn/react,pyitphyoaung/react,jdlehman/react,flarnie/react,TaaKey/react,edmellum/react,dittos/react,TheBlasfem/react,rickbeerendonk/react,niubaba63/react,syranide/react,andrerpena/react,elquatro/react,kaushik94/react,airondumael/react,roth1002/react,dortonway/react,hejld/react,krasimir/react,rickbeerendonk/react,zeke/react,chippieTV/react,yangshun/react,conorhastings/react,quip/react,nickdima/react,STRML/react,ABaldwinHunter/react-engines,krasimir/react,apaatsio/react,mgmcdermott/react,yangshun/react,chenglou/react,roth1002/react,reactkr/react,roth1002/react,yuhualingfeng/react,tlwirtz/react,yiminghe/react,jordanpapaleo/react,ArunTesco/react,nickdima/react,billfeller/react,mgmcdermott/react,anushreesubramani/react,salier/react,Simek/react,pyitphyoaung/react,yiminghe/react,dmitriiabramov/react,with-git/react,ashwin01/react,jdlehman/react,jordanpapaleo/react,jordanpapaleo/react,pyitphyoaung/react,microlv/react,rohannair/react,iamchenxin/react,aaron-goshine/react,with-git/react,andrerpena/react,glenjamin/react,pandoraui/react,dittos/react,cpojer/react,ericyang321/react,ABaldwinHunter/react-classic,reactjs-vn/reactjs_vndev,chicoxyzzy/react,chicoxyzzy/react,jorrit/react,flarnie/react,leexiaosi/react,jdlehman/react,salzhrani/react,AlmeroSteyn/react,yangshun/react,edvinerikson/react,VioletLife/react,airondumael/react,salzhrani/react,miaozhirui/react,facebook/react,yuhualingfeng/react,rlugojr/react,nhunzaker/react,cpojer/react,hejld/react,salzhrani/react,aickin/react,salier/react,wmydz1/react,richiethomas/react,facebook/react,shergin/react,Simek/react,facebook/react,claudiopro/react,terminatorheart/react,Simek/react,nathanmarks/react,chicoxyzzy/react,silvestrijonathan/react,Simek/react,wmydz1/react,microlv/react,ericyang321/react,bspaulding/react,krasimir/react,maxschmeling/react,ameyms/react,jimfb/react,iamchenxin/react,empyrical/react,iamchenxin/react,STRML/react,chenglou/react,brigand/react,camsong/react,bspaulding/react,salzhrani/react,theseyi/react,acdlite/react,linmic/react,rohannair/react,jorrit/react,tlwirtz/react,jquense/react,ameyms/react,pyitphyoaung/react,rricard/react,dmitriiabramov/react,dittos/react,claudiopro/react,ericyang321/react,dilidili/react,edmellum/react,claudiopro/react,edmellum/react,dilidili/react,shergin/react,wmydz1/react,maxschmeling/react,pswai/react,bspaulding/react,empyrical/react,apaatsio/react,yungsters/react,STRML/react,brigand/react,trueadm/react,ashwin01/react,terminatorheart/react,yungsters/react,edvinerikson/react,rickbeerendonk/react,TheBlasfem/react,jontewks/react,pswai/react,richiethomas/react,reactjs-vn/reactjs_vndev,VioletLife/react,apaatsio/react,joecritch/react,chippieTV/react,mjackson/react,salier/react,glenjamin/react,chippieTV/react,ABaldwinHunter/react-classic,niubaba63/react,pandoraui/react,usgoodus/react,TaaKey/react,rickbeerendonk/react,aickin/react,ABaldwinHunter/react-classic,jimfb/react,camsong/react,empyrical/react,anushreesubramani/react,sekiyaeiji/react,jzmq/react,dortonway/react,tlwirtz/react,VioletLife/react,theseyi/react,nhunzaker/react,jorrit/react,staltz/react,elquatro/react,Simek/react,staltz/react,ArunTesco/react,ashwin01/react,maxschmeling/react,richiethomas/react,bspaulding/react,hejld/react,jorrit/react,krasimir/react,joaomilho/react,camsong/react,acdlite/react,STRML/react,nhunzaker/react,niubaba63/react,billfeller/react,usgoodus/react,mosoft521/react,bspaulding/react,aaron-goshine/react,brigand/react,eoin/react,kaushik94/react,microlv/react,camsong/react,wmydz1/react,miaozhirui/react,billfeller/react,brigand/react,rricard/react,eoin/react,syranide/react,AlmeroSteyn/react,bspaulding/react,jimfb/react,Simek/react,yiminghe/react,yungsters/react,silvestrijonathan/react,chippieTV/react,ABaldwinHunter/react-engines,dilidili/react,silvestrijonathan/react,DJCordhose/react,joecritch/react,claudiopro/react,aickin/react,jimfb/react,flarnie/react,elquatro/react,quip/react,yiminghe/react,joecritch/react,salier/react,ameyms/react,elquatro/react,ABaldwinHunter/react-engines,andrerpena/react,iamchenxin/react,camsong/react,krasimir/react,mjackson/react,flipactual/react,staltz/react,mgmcdermott/react,ABaldwinHunter/react-classic,facebook/react,iamchenxin/react,silvestrijonathan/react,reactjs-vn/reactjs_vndev,mgmcdermott/react,airondumael/react,rlugojr/react,shergin/react,STRML/react,mhhegazy/react,DJCordhose/react,usgoodus/react,krasimir/react,ABaldwinHunter/react-engines,jontewks/react,ABaldwinHunter/react-engines,prometheansacrifice/react,edvinerikson/react,richiethomas/react,jzmq/react,kaushik94/react,edvinerikson/react,tomocchino/react,quip/react,chippieTV/react,cpojer/react,jordanpapaleo/react,yungsters/react,richiethomas/react,pandoraui/react,aaron-goshine/react,prometheansacrifice/react,empyrical/react,camsong/react,aickin/react,dmitriiabramov/react,joaomilho/react,dilidili/react,jameszhan/react,rohannair/react,nathanmarks/react,ericyang321/react,chenglou/react,staltz/react,kaushik94/react,ArunTesco/react,cpojer/react,jdlehman/react,dilidili/react,hejld/react,nathanmarks/react,jordanpapaleo/react,dilidili/react,AlmeroSteyn/react,chenglou/react,salier/react,pswai/react,ericyang321/react,zeke/react,TaaKey/react,aaron-goshine/react,apaatsio/react,silvestrijonathan/react,jameszhan/react,mosoft521/react,pyitphyoaung/react,joaomilho/react,maxschmeling/react,tom-wang/react,chicoxyzzy/react,jontewks/react,kaushik94/react,richiethomas/react,niubaba63/react,aickin/react,yuhualingfeng/react,jdlehman/react,tom-wang/react,trueadm/react,ABaldwinHunter/react-classic,tlwirtz/react,nickdima/react,brigand/react,cody/react,ameyms/react,leexiaosi/react,quip/react,VioletLife/react,salzhrani/react,edmellum/react,dittos/react,andrerpena/react,yuhualingfeng/react,salzhrani/react,empyrical/react,silvestrijonathan/react,eoin/react,AlmeroSteyn/react,kaushik94/react,jzmq/react,AlmeroSteyn/react,tom-wang/react,reactjs-vn/reactjs_vndev,leexiaosi/react,STRML/react,airondumael/react,TaaKey/react,jontewks/react,TaaKey/react,linmic/react,DJCordhose/react,jameszhan/react,dortonway/react,mhhegazy/react,flipactual/react,ashwin01/react,jquense/react,usgoodus/react,joaomilho/react,roth1002/react,andrerpena/react,anushreesubramani/react,yungsters/react,niubaba63/react,anushreesubramani/react,VioletLife/react,reactkr/react,edvinerikson/react,rickbeerendonk/react,cody/react,facebook/react,reactkr/react,usgoodus/react,reactjs-vn/reactjs_vndev,with-git/react,zeke/react,theseyi/react,claudiopro/react,flarnie/react,TaaKey/react,yiminghe/react,usgoodus/react,chippieTV/react,facebook/react,sekiyaeiji/react,tomocchino/react,jdlehman/react,joecritch/react,theseyi/react,with-git/react,reactkr/react,maxschmeling/react,terminatorheart/react,wmydz1/react,yangshun/react,tomocchino/react,nickdima/react,DJCordhose/react,niubaba63/react,ashwin01/react,flipactual/react,jorrit/react,VioletLife/react,mhhegazy/react,jameszhan/react,cody/react,tomocchino/react,flarnie/react,mosoft521/react,yiminghe/react,jameszhan/react,mjackson/react,aaron-goshine/react,joaomilho/react,yangshun/react,airondumael/react,maxschmeling/react,DJCordhose/react,elquatro/react,tom-wang/react,terminatorheart/react,apaatsio/react,ABaldwinHunter/react-classic,acdlite/react,kaushik94/react,rlugojr/react,jquense/react,theseyi/react,wmydz1/react,microlv/react,nhunzaker/react,prometheansacrifice/react,aickin/react,prometheansacrifice/react,aaron-goshine/react,rlugojr/react,edvinerikson/react,TaaKey/react,rlugojr/react,linmic/react,cpojer/react,roth1002/react,glenjamin/react,syranide/react,hejld/react,bspaulding/react,mosoft521/react,dittos/react,billfeller/react,pandoraui/react,ashwin01/react,iamchenxin/react,dmitriiabramov/react,nhunzaker/react,empyrical/react,staltz/react,ericyang321/react,conorhastings/react,roth1002/react,trueadm/react,jimfb/react,ameyms/react,theseyi/react,conorhastings/react,rlugojr/react,anushreesubramani/react,brigand/react,jquense/react,joecritch/react,facebook/react,hejld/react,claudiopro/react,elquatro/react,tomocchino/react,rohannair/react,reactjs-vn/reactjs_vndev,TaaKey/react,eoin/react,quip/react,nhunzaker/react,jzmq/react,TheBlasfem/react,mjackson/react,mhhegazy/react,quip/react,zeke/react,dortonway/react,ameyms/react,terminatorheart/react,rricard/react,flarnie/react,richiethomas/react,tlwirtz/react,camsong/react,miaozhirui/react,nathanmarks/react,chicoxyzzy/react,staltz/react,billfeller/react,rohannair/react,tom-wang/react,dittos/react,microlv/react,TheBlasfem/react,acdlite/react,edvinerikson/react,cody/react,dmitriiabramov/react,trueadm/react,edmellum/react,reactkr/react,cpojer/react,TaaKey/react,yuhualingfeng/react,glenjamin/react,jameszhan/react,mosoft521/react,tlwirtz/react,conorhastings/react,andrerpena/react,dmitriiabramov/react,zeke/react,prometheansacrifice/react,Simek/react,conorhastings/react,mosoft521/react,prometheansacrifice/react,tom-wang/react,mgmcdermott/react,mosoft521/react,yiminghe/react,rricard/react,chenglou/react,jzmq/react,chenglou/react,acdlite/react,joecritch/react,dortonway/react,jdlehman/react,apaatsio/react,rohannair/react,joaomilho/react,shergin/react,anushreesubramani/react,mjackson/react,mgmcdermott/react,jordanpapaleo/react,jordanpapaleo/react,conorhastings/react,shergin/react,syranide/react,jquense/react,zeke/react,rickbeerendonk/react,mjackson/react,trueadm/react,with-git/react,trueadm/react,rricard/react,nhunzaker/react,pswai/react,yungsters/react,nathanmarks/react,nathanmarks/react,salier/react,billfeller/react,TaaKey/react,jimfb/react,jquense/react,jorrit/react,empyrical/react,cody/react,TheBlasfem/react,glenjamin/react,shergin/react,jquense/react,yungsters/react,rlugojr/react,eoin/react,jameszhan/react,glenjamin/react,reactkr/react,eoin/react,jontewks/react,pswai/react,chenglou/react,wmydz1/react,jzmq/react,TaaKey/react,jzmq/react,trueadm/react,rohannair/react,glenjamin/react,ericyang321/react,linmic/react,mhhegazy/react,acdlite/react,krasimir/react,acdlite/react,edmellum/react,mhhegazy/react,pandoraui/react,claudiopro/react,brigand/react,terminatorheart/react,VioletLife/react,yangshun/react,TheBlasfem/react,with-git/react,tomocchino/react,apaatsio/react,pswai/react,sekiyaeiji/react