title: Map<String,String> Dart equivalent in Typescript?
body: <p>I am trying to find an equivalent to <code>Map&lt;String, String&gt;</code> in Dart, but usable in Typescript. This is a quick way to define a string:string key:value store.</p>
  
  <p>Also, this can be used like this, which is my next question:</p>
  
  <p><code>Map&lt;String, List&lt;String&gt;&gt;</code></p>
  
  <p>This would define a key:value store where the keys are strings and the values are a list of strings.</p>
  
  <p>Is there any way to do either in Typescript?</p>