[Feature request] Have a configuration option to add width to the image tag

Would it be possible to have a configuration option to set a width that gets added to the image tag when inserted? for example: ``` <img width="200" src="https://media2.giphy.com/media/v1.Y2lkPWJkM2VhNTdlZHY4cmphYzBqamRreDNmNG5wdzk4OThocmhpMWc4ZTE3OXp6Yzh3NCZlcD12MV9naWZzX3NlYXJjaCZjdD1n/26FKU2nETBH2tQd6E/giphy.gif"/> ``` That produces: <img width="200" src="https://media2.giphy.com/media/v1.Y2lkPWJkM2VhNTdlZHY4cmphYzBqamRreDNmNG5wdzk4OThocmhpMWc4ZTE3OXp6Yzh3NCZlcD12MV9naWZzX3NlYXJjaCZjdD1n/26FKU2nETBH2tQd6E/giphy.gif"/>