PubMatic Bid Adapter: add Groupm as alias bidder (prebid#7692)

* Changed net revenue to True

* Added groupm as alias in pubmaticBidAdapter

* Added gvlid for groupm alias

* add space for linting

Co-authored-by: Azhar <azhar@L1119.local>
Co-authored-by: Chris Huie <phoenixtechnerd@gmail.com>

modules/pubmaticBidAdapter.js

@@ -11,6 +11,7 @@ const USER_SYNC_URL_IFRAME = 'https://ads.pubmatic.com/AdServer/js/user_sync.htm
 const USER_SYNC_URL_IMAGE = 'https://image8.pubmatic.com/AdServer/ImgSync?p=';
 const DEFAULT_CURRENCY = 'USD';
 const AUCTION_TYPE = 1;
+const GROUPM_ALIAS = {code: 'groupm', gvlid: 98};
 const UNDEFINED = undefined;
 const DEFAULT_WIDTH = 0;
 const DEFAULT_HEIGHT = 0;
@@ -1005,6 +1006,7 @@ export const spec = {
   code: BIDDER_CODE,
   gvlid: 76,
   supportedMediaTypes: [BANNER, VIDEO, NATIVE],
+  aliases: [GROUPM_ALIAS],
   /**
   * Determines whether or not the given bid request is valid. Valid bid request must have placementId and hbid
   *