get and display the map name

[jakoch]

The tool currently displays "?" as the map name. Sadly, i wasn't able to find the map name in the dataset of the recent matches. This example dataset shows the structure: https://github.com/joshuaferrara/node-csgo/tree/master#matchlist-response-to-requestrecentgames

How to get the map name?

Referencing:

• https://github.com/joshuaferrara/node-csgo/issues/25