add types for addSearchWithOther properties

readme.md

@@ -148,15 +148,15 @@ Show the `Search with Google` menu item when right-clicking text.
 Type: `object: {title: string; url: string}`\
 Default: `{}`
 
-Add a `Search with {searchEngine}` menu item when right-clicking text. 
+Add a `Search with {searchEngine}` menu item when right-clicking text.
 
-This allows the use of a search engine besides Google (e.g., Bing and DuckDuckGo). The `title` and `url` of the desired search engine need to be provided. The `{searchEngine}` placeholder will be replaced by `title`. 
+This allows the use of a search engine besides Google (e.g., Bing and DuckDuckGo). The `title` and `url` of the desired search engine need to be provided. The `{searchEngine}` placeholder will be replaced by `title`.
 
 Properties:
 
-`title`: Title/name of search engine
+`title` - string - Title/name of search engine
 
-`url`: URL of search engine (with query syntax used in Chrome)
+`url` - string - URL of search engine (with query syntax used in Chrome)
 
 Examples:
 ```js