Relaido Bid Adapter: Add support for bids[].params.video.playerSize

[relaido]

Type of change

• Bugfix
• Feature
• New bidder adapter
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Does this change affect user-facing APIs or examples documented on http://prebid.org?
• Other

Description of change

• If mediaTypes.video.playerSize does not have a definition, but valid bids[].params.video.playerSize does, allow it.

  {
    mediaTypes: {
      video: {
        context: 'outstream'
        // Not definition playerSize
      }
    },
    bids: [
      {
        bidder: 'relaido',
        params: {
          placementId: '100000',
          video: {
            playerSize: [
              [640, 360]
            ]
          }
        }
      },
      ...
    ]
  }
  

• Add support for playerSize is Array[Number, Number]

  {
    mediaTypes: {
      video: {
        context: 'outstream',
        playerSize: [640, 360] // [[640, 360]] also ok
      }
    },
    bids: [
      {
        bidder: 'relaido',
        params: {
          placementId: '100000',
          video: {
            playerSize: [640, 360] // [[640, 360]] also ok
          }
        }
      },
      ...
    ]
  }