cleanup: old attr syntax

Author: chase-moskal

s/components/button/showcase.ts

@@ -47,7 +47,7 @@ export const buttonShowcase = Showcase({
 			],
 			style: css``,
 			presentation: views => html`
-				${views.ShinyButton.props().attr("gradient", true).children("button").render()}
+				${views.ShinyButton.props().attr("gradient").children("button").render()}
 			`,
 		},
 		{

s/demo/views/demonstration/view.ts

@@ -40,7 +40,7 @@ export const Demonstration = view(use => (options: {
 					${options.snippets.map(([label]) => (
 						auraViews.ShinyButton
 							.props()
-							.attr("plain", true)
+							.attr("plain")
 							.children(label.button)
 							.render()
 					))}

s/demo/views/exhibit/view.ts

@@ -40,7 +40,7 @@ export const Exhibit = view(use => (
 						.children(exhibit.snippets.map(s =>
 							auraViews.ShinyButton
 								.props()
-								.attr("plain", true)
+								.attr("plain")
 								.children(s.label)
 								.render()
 						))

s/demo/views/showcase/view.ts

@@ -31,7 +31,7 @@ export const Showcase = view(use => (options: {
 					.children(options.exhibits.map(p =>
 						auraViews.ShinyButton
 							.props()
-							.attr("sad", true)
+							.attr("sad")
 							.children(p.label)
 							.render()
 					))