HTMLDocument.registerElement is deprecated. #83
Description
Use customElements.define instead of document.registerElement see https://javascript.info/custom-elements
HTMLDocument.registerElement (file:///Applications/Atom%20Beta.app/Contents/Resources/app.asar/static/index.js:160:12)
registerElement (/Users/firemanchief52/.atom/packages/symbols-list/node_modules/space-pen/lib/space-pen.js:66:88)
Builder.openTag (/Users/firemanchief52/.atom/packages/symbols-list/node_modules/space-pen/lib/space-pen.js:297:27)
Builder.tag (/Users/firemanchief52/.atom/packages/symbols-list/node_modules/space-pen/lib/space-pen.js:274:12)
Function.div (/Users/firemanchief52/.atom/packages/symbols-list/node_modules/space-pen/lib/space-pen.js:83:49)
Function.content (/Users/firemanchief52/.atom/packages/symbols-list/lib/symbols-list-view.coffee:23:19)