Add PlayStation 4 browser support

src/parser-os.js

@@ -150,4 +150,16 @@ export default [
       };
     },
   },
+
+  /* Playstation 4 */
+  {
+    test: [/PlayStation 4/],
+    describe(ua) {
+      const version = getFirstMatch(/PlayStation 4[/\s](\d+(\.\d+)*)/i, ua);
+      return {
+        name: 'PlayStation 4',
+        version,
+      };
+    },
+  },
 ];