fix: transition slide not smooth with min height and min width

Author: xxkl1

packages/playground/src/App.svelte

@@ -4,4 +4,4 @@
 
 <div>
     Hello world!
-</div>
+</div>

packages/svelte/src/runtime/transition/index.js

@@ -84,6 +84,7 @@ export function slide(node, { delay = 0, duration = 400, easing = cubicOut, axis
 	const style = getComputedStyle(node);
 	const opacity = +style.opacity;
 	const primary_property = axis === 'y' ? 'height' : 'width';
+	const min_primary_property = `min-${primary_property}`;
 	const primary_property_value = parseFloat(style[primary_property]);
 	const secondary_properties = axis === 'y' ? ['top', 'bottom'] : ['left', 'right'];
 	const capitalized_secondary_properties = secondary_properties.map(
@@ -107,6 +108,7 @@ export function slide(node, { delay = 0, duration = 400, easing = cubicOut, axis
 			'overflow: hidden;' +
 			`opacity: ${Math.min(t * 20, 1) * opacity};` +
 			`${primary_property}: ${t * primary_property_value}px;` +
+			`${min_primary_property}: 0;` +
 			`padding-${secondary_properties[0]}: ${t * padding_start_value}px;` +
 			`padding-${secondary_properties[1]}: ${t * padding_end_value}px;` +
 			`margin-${secondary_properties[0]}: ${t * margin_start_value}px;` +

packages/svelte/test/runtime/samples/class-shortcut-with-transition/_config.js

@@ -16,7 +16,7 @@ export default {
 		raf.tick(150);
 		assert.htmlEqual(
 			target.innerHTML,
-			'<p>foo</p><p class="red svelte-1yszte8 border" style="animation: __svelte_1333973250_0 100ms linear 0ms 1 both;">bar</p>'
+			'<p>foo</p><p class="red svelte-1yszte8 border" style="animation: __svelte_567626776_0 100ms linear 0ms 1 both;">bar</p>'
 		);
 
 		component.open = true;