feat(examples): upgrade retro example deps

examples/retro/package.json

@@ -1,25 +1,23 @@
 {
   "name": "nivo-example-retro",
-  "version": "0.32.0-9",
+  "version": "0.49.0",
   "private": true,
   "dependencies": {
-    "@nivo/bar": "^0.33.0-4",
-    "@nivo/chord": "^0.33.0-4",
-    "@nivo/circle-packing": "^0.32.0",
-    "@nivo/core": "^0.32.0",
-    "@nivo/generators": "^0.32.0",
-    "@nivo/heatmap": "^0.33.0-4",
-    "@nivo/pie": "^0.33.0-4",
-    "@nivo/stream": "^0.33.0-4",
-    "@nivo/treemap": "^0.32.0",
-    "react": "16.2.0",
-    "react-dom": "16.2.0",
-    "react-scripts": "1.0.13"
+    "@nivo/bar": "0.49.0",
+    "@nivo/chord": "0.49.0",
+    "@nivo/circle-packing": "0.49.0",
+    "@nivo/core": "0.49.0",
+    "@nivo/generators": "0.49.0",
+    "@nivo/heatmap": "0.49.0",
+    "@nivo/pie": "0.49.0",
+    "@nivo/stream": "0.49.0",
+    "@nivo/treemap": "0.49.0",
+    "react": "^16.5.0",
+    "react-dom": "^16.5.0",
+    "react-scripts": "^1.1.5"
   },
   "scripts": {
     "start": "react-scripts start",
-    "build": "react-scripts build",
-    "test": "react-scripts test --env=jsdom",
-    "eject": "react-scripts eject"
+    "build": "react-scripts build"
   }
 }