fix(types): Add missing applicationNameForUserAgent type in WebViewSharedProps (#1542)

src/WebViewTypes.ts

    * Should caching be enabled. Default is true.
    */
   cacheEnabled?: boolean;
+
+  /**
+   * Append to the existing user-agent. Overridden if `userAgent` is set.
+   */
+  applicationNameForUserAgent?: string;
 }