Also check string "1" is not a number in draft 4

Author: Relequestual

tests/draft4/type.json

@@ -18,6 +18,11 @@
                 "data": "foo",
                 "valid": false
             },
+            {
+                "description": "a string is still not an integer, even if it looks like one",
+                "data": "1",
+                "valid": false
+            },
             {
                 "description": "an object is not an integer",
                 "data": {},
@@ -59,6 +64,11 @@
                 "data": "foo",
                 "valid": false
             },
+            {
+                "description": "a string is still not a number, even if it looks like one",
+                "data": "1",
+                "valid": false
+            },
             {
                 "description": "an object is not a number",
                 "data": {},
@@ -100,6 +110,11 @@
                 "data": "foo",
                 "valid": true
             },
+            {
+                "description": "a string is still a string, even if it looks like a number",
+                "data": "1",
+                "valid": true
+            },
             {
                 "description": "an object is not a string",
                 "data": {},