feat(preview): Update Preview SDK to latest version (#2770)

Author: jcamden

src/constants.js

@@ -169,7 +169,7 @@ export const DELIMITER_SLASH: 'slash' = 'slash';
 export const DELIMITER_CARET: 'caret' = 'caret';
 
 /* ---------------------- Defaults -------------------------- */
-export const DEFAULT_PREVIEW_VERSION = '2.80.0';
+export const DEFAULT_PREVIEW_VERSION = '2.81.0';
 export const DEFAULT_LOCALE = 'en-US';
 export const DEFAULT_PATH_STATIC = 'platform/elements';
 export const DEFAULT_PATH_STATIC_PREVIEW = 'platform/preview';