Update package.json

eliminating peer dependencies, making sure all dependencies are installed with the package

dist/preview release/viewer/package.json

@@ -35,12 +35,10 @@
     "dependencies": {
         "deepmerge": "~2.1.1",
         "handlebars": "~4.0.11",
-        "pepjs": "~0.4.3"
-    },
-    "peerDependencies": {
+        "pepjs": "~0.4.3",
         "babylonjs": ">3.3.0-alpha",
         "babylonjs-loaders": ">3.3.0-alpha",
         "babylonjs-gltf2interface": ">3.3.0-alpha",
         "babylonjs-viewer-assets": ">3.3.0-alpha"
     }
-}
+}