Use await when creating Drawings

Thanks to cole (not cora!) (cole#9640) on Foundry Discord

module.json

@@ -3,10 +3,10 @@
 	"title": "Walls-to-Drawing",
 	"description": "Convert selected walls to a Drawing to make walls visible to players",
 	"authors": [{ "name": "BertieB", "email": "foundry@bertieb.org", "url": "https://bertieb.org" }],
-	"version": "0.0.5",
+	"version": "0.0.6",
 	"minimumCoreVersion": "0.6.5",
 	"scripts": [ "scripts/wallconvert.js" ],
 	"url": "https://git.bertieb.org/bertieb/foundry-walls-to-drawing",
 	"manifest": "https://git.bertieb.org/bertieb/foundry-walls-to-drawing/raw/branch/master/module.json",
-	"download": "https://git.bertieb.org/bertieb/foundry-walls-to-drawing/archive/0.0.5.zip"
+	"download": "https://git.bertieb.org/bertieb/foundry-walls-to-drawing/archive/0.0.6.zip"
 }

scripts/wallconvert.js

@@ -45,7 +45,7 @@ Hooks.on('getSceneControlButtons', controls => {
 		"title": "Convert selected to Drawing",
 		"onClick": () => {
 			canvas.walls.controlled.forEach(function(wall) {
-				Drawing.create({
+				await Drawing.create({
 					type: CONST.DRAWING_TYPES.POLYGON,
 					author: game.user._id,
 					x: 0,