Fixes bug where Astro can't distinguish between two equal components …

…differing only by props when hydrating (withastro#846)

src/internal/__astro_component.ts

@@ -187,7 +187,8 @@ export function __astro_component(Component: any, metadata: AstroComponentMetada
     }
 
     // If we ARE hydrating this component, let's generate the hydration script
-    const astroId = hash.unique(html);
+    const stringifiedProps = JSON.stringify(props);
+    const astroId = hash.unique(html + stringifiedProps);
     const script = await generateHydrateScript({ instance, astroId, props }, metadata as Required<AstroComponentMetadata>);
     const astroRoot = `<astro-root uid="${astroId}">${html}</astro-root>`;
     return [astroRoot, script].join('\n');