Set Attr and related APIs as supported since Safari 1

The difference between Safari 1 and 1.3 is of course not important, but
some assumption has to be made to fix localName/namespaceURI/prefix:
mdn#9561

Based on current Web IDL, the set of related APIs are:
- Document.createAttribute
- Document.createAttributeNS
- Element.attributes (a NamedNodeMap)
- Element.getAttributeNode
- Element.getAttributeNodeNS
- Element.setAttributeNode
- Element.setAttributeNodeNS
- Element.removeAttributeNode
- NamedNodeMap and all of its members

All can be found in the bindings of the revision tagged Safari 85:
https://trac.webkit.org/browser/webkit/trunk/WebCore/khtml/ecma/kjs_dom.lut.h?rev=4552

The only complication is Attr.localName/namespaceURI/prefix, which was
then on Node, but judging by the implementation they probably worked:
https://trac.webkit.org/browser/webkit/trunk/WebCore/khtml/dom/dom_node.cpp?rev=4552

api/Attr.json

@@ -82,7 +82,7 @@
               "notes": "This API was previously available on the <a href='https://developer.mozilla.org/docs/Web/API/Node'><code>Node</code></a> API."
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -185,7 +185,7 @@
               "notes": "This API was previously available on the <a href='https://developer.mozilla.org/docs/Web/API/Node'><code>Node</code></a> API."
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -288,7 +288,7 @@
               "notes": "This API was previously available on the <a href='https://developer.mozilla.org/docs/Web/API/Node'><code>Node</code></a> API."
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"

api/Element.json

@@ -1297,7 +1297,7 @@
               "version_added": "10.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -3914,7 +3914,7 @@
               "version_added": "≤12.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -3962,7 +3962,7 @@
               "version_added": "≤12.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -6543,7 +6543,7 @@
               "version_added": "≤12.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -7963,7 +7963,7 @@
               "version_added": "≤12.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"
@@ -8013,7 +8013,7 @@
               "version_added": "≤12.1"
             },
             "safari": {
-              "version_added": "1.3"
+              "version_added": "1"
             },
             "safari_ios": {
               "version_added": "1"