Build: Update tested browsers to match jQuery 3.0

Author: mgol

build/browserstack-current.json

@@ -14,7 +14,7 @@
 		"edge_latest",
 		{
 			"os": "iOS",
-			"os_version": "8.3",
+			"os_version": "9.3",
 			"real_mobile": false
 		}
 	]

build/browserstack-legacy.json

@@ -8,7 +8,6 @@
 	"browsers": [
 		"chrome_previous",
 		"firefox_previous",
-		"opera_previous",
 		{
 			"browser": "safari",
 			"browser_version": "8.0"
@@ -17,12 +16,12 @@
 		"ie_10",
 		{
 			"os": "iOS",
-			"os_version": "6.0",
+			"os_version": "7.0",
 			"real_mobile": false
 		},
 		{
 			"os": "iOS",
-			"os_version": "7.0",
+			"os_version": "8.3",
 			"real_mobile": false
 		}
 	]