Use <details> tag in issue template 📝
Use <details> tag in issue template 📝

[demo](https://twitter.com/ericclemmons/status/749223563790471169)

fatso83/Sinon.JS,jishi/sinon,mroderick/Sinon.JS,fatso83/Sinon.JS,andpor/sinon,cjohansen/Sinon.JS,mroderick/Sinon.JS,Khan/Sinon.JS,jishi/sinon,fatso83/Sinon.JS,jishi/sinon,andpor/sinon,Khan/Sinon.JS,mroderick/Sinon.JS,Khan/Sinon.JS,andpor/sinon,cjohansen/Sinon.JS,cjohansen/Sinon.JS