inputmode is now supported on iOS 12.2 Safari (#3738)

Author: danwilson

html/global_attributes.json

@@ -871,7 +871,7 @@
               "version_added": false
             },
             "safari_ios": {
-              "version_added": false
+              "version_added": "12.2"
             },
             "webview_android": {
               "version_added": "66"