Set package version to 0.5.3, reflecting addition of the orthographic…

… camera

package.json

@@ -1,6 +1,6 @@
 {
   "name": "manifesto3d.js",
-  "version" : "0.5.2",
+  "version" : "0.5.3",
   "description": "IIIF Presentation API utility library for client and server with 3D extension",
   "main": "./dist-commonjs/index.js",
   "module": "./dist-esmodule/index.js",