updated saucelab browser version (#355)

sauce_browsers.json

@@ -1,15 +1,15 @@
 [
   {
     "browserName" : "firefox",
-    "platform" : "OS X 10.9",
-    "version": "49.0",
+    "platform" : "OS X 10.11",
+    "version": "59.0",
     "name": "firefox-latest-mac"
   },
   {
     "browserName" : "chrome",
-    "platform" : "OS X 10.9",
+    "platform" : "OS X 10.11",
     "timeZone": "Pacific",
-    "version" : "54.0",
+    "version" : "65.0",
     "name": "chrome-latest-mac"
   },
   {
@@ -30,8 +30,8 @@
     "browserName" : "MicrosoftEdge",
     "platform" : "Windows 10",
     "timeZone": "Pacific",
-    "version" : "14.14393",
-    "name": "edge-14-windows"
+    "version" : "16.16299",
+    "name": "edge-16-windows"
   },
   {
     "browserName" : "safari",
@@ -50,9 +50,9 @@
   {
     "deviceName": "iPhone 6 Simulator",
     "platformName": "iOS",
-    "platformVersion": "8.4",
+    "platformVersion": "11.2",
     "browserName": "Safari",
-    "name": "ios-84-sim"
+    "name": "ios-11-sim"
   },
   {
     "deviceName": "iPhone 6 Simulator",