move moment to peer dependency

Author: Scott Watkins

package-lock.json

@@ -50,7 +50,6 @@
     "jest-watch-typeahead": "0.4.2",
     "less-loader": "^5.0.0",
     "mini-css-extract-plugin": "0.9.0",
-    "moment-timezone": "^0.5.28",
     "optimize-css-assets-webpack-plugin": "5.0.3",
     "pnp-webpack-plugin": "1.6.4",
     "postcss-flexbugs-fixes": "4.1.0",
@@ -215,5 +214,8 @@
   "peerDependencies": {
     "react": "^16.8.0",
     "react-dom": "^16.8.0"
+  },
+  "optionalDependencies": {
+    "moment-timezone": "^0.5.28"
   }
 }