Build: Update tested browsers

iOS 13 is skipped for now due to a bug in browserstack-runner,
see browserstack/browserstack-runner#226.

IE 9 && iOS 10 are skipped because I can't get them to show any output, they
just times out.

Author: mgol

build/browserstack-current.json

@@ -11,11 +11,17 @@
 		"opera_current",
 		"safari_current",
 		"ie_11",
+		"edge_18",
 		"edge_latest",
 		{
 			"os": "iOS",
-			"os_version": "11.0",
-			"real_mobile": false
+			"os_version": "11",
+			"device": "iPhone X"
+		},
+		{
+			"os": "iOS",
+			"os_version": "12",
+			"device": "iPhone XS"
 		}
 	]
 }

build/browserstack-legacy.json

@@ -10,26 +10,23 @@
 		"firefox_previous",
 		"safari_previous",
 		"edge_previous",
-		"ie_9",
 		"ie_10",
 		{
 			"os": "iOS",
 			"os_version": "7.0",
+			"device": "iPhone 5S",
 			"real_mobile": false
 		},
 		{
 			"os": "iOS",
 			"os_version": "8.3",
+			"device": "iPhone 6",
 			"real_mobile": false
 		},
 		{
 			"os": "iOS",
 			"os_version": "9.3",
-			"real_mobile": false
-		},
-		{
-			"os": "iOS",
-			"os_version": "10.3",
+			"device": "iPhone 6S",
 			"real_mobile": false
 		}
 	]