Hoist dependencies = smaller react-router-dom UMD (remix-run#5720)

* Hoist dependencies = smaller react-router-dom UMD

Previously, react-router-dom's UMD builds contained duplicate code because they were fetching from both `packages/react-router/node-modules` and `packages/react-router-dom/node_modules`. With hoisting, this build is now
fetching from the root `node_modules`.

* eslint --fix the website.

* Update and sync packages.

* Fix website for React 16

* De-hoist RRN's react dep

Author: pshrmn

packages/react-router-config/package.json

@@ -42,7 +42,7 @@
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-react": "^7.4.0",
     "gzip-size": "^4.0.0",
-    "history": "^4.6.3",
+    "history": "^4.7.2",
     "jest": "^21.2.1",
     "pretty-bytes": "^4.0.2",
     "raf": "^3.4.0",

packages/react-router-dom/rollup.config.js

@@ -19,7 +19,7 @@ const config = {
     }),
     resolve({
       customResolveOptions: {
-        moduleDirectory: ['node_modules', '../']
+        moduleDirectory: ['../../node_modules', '../']
       }
     }),
     commonjs({