Update vitreum (#946)

- Updates Vitreum to v6.0.1 + some custom fixes.
  - Stylesheets must be imported with `require('./sheet.less');` but can also can now share stylesheets between jsx components.
  - Should eliminate a lot of security concerns with older nested dependencies.
  - Changed a lot of files to make this work
- Also removes dependency on PicoRouter in favor of React-Router

package.json

@@ -2,6 +2,9 @@
   "name": "homebrewery",
   "description": "Create authentic looking D&D homebrews using only markdown",
   "version": "2.8.2",
+  "engines": {
+    "node": "12.16.x"
+  },
   "repository": {
     "type": "git",
     "url": "git://github.com/naturalcrit/homebrewery.git"
@@ -9,7 +12,8 @@
   "scripts": {
     "dev": "node scripts/dev.js",
     "quick": "node scripts/quick.js",
-    "build": "node scripts/build.js",
+    "build": "node scripts/buildHomebrew.js",
+    "buildall": "node scripts/buildHomebrew.js && node scripts/buildAdmin.js",
     "lint": "eslint --fix **/*.{js,jsx}",
     "lint:dry": "eslint **/*.{js,jsx}",
     "circleci": "npm test && eslint **/*.{js,jsx} --max-warnings=0",
@@ -18,7 +22,7 @@
     "test:dev": "pico-check -v -w",
     "phb": "node scripts/phb.js",
     "prod": "set NODE_ENV=production && npm run build",
-    "postinstall": "npm run build",
+    "postinstall": "npm run buildall",
     "start": "node server.js"
   },
   "author": "stolksdorf",
@@ -36,26 +40,31 @@
     ]
   },
   "dependencies": {
-    "babel-preset-env": "^1.7.0",
-    "babel-preset-react": "^6.24.1",
+    "@babel/core": "^7.9.0",
+    "@babel/preset-env": "^7.9.6",
+    "@babel/preset-react": "^7.9.4",
     "body-parser": "^1.19.0",
     "classnames": "^2.2.6",
     "codemirror": "^5.53.2",
     "cookie-parser": "^1.4.5",
     "create-react-class": "^15.6.3",
     "express": "^4.17.1",
+    "fs-extra": "9.0.0",
     "jwt-simple": "^0.5.6",
+    "less": "^3.11.1",
     "lodash": "^4.17.15",
     "marked": "^0.3.19",
     "moment": "^2.25.3",
     "mongoose": "^5.9.12",
     "nconf": "^0.10.0",
-    "pico-router": "^2.1.0",
+    "prop-types": "15.7.2",
+    "query-string": "6.12.1",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
+    "react-router-dom": "5.2.0",
     "shortid": "^2.2.15",
     "superagent": "^5.2.2",
-    "vitreum": "^4.10.1"
+    "vitreum": "github:calculuschild/vitreum#21a8e1c9421f1d3a3b474c12f480feb2fbd28c5b"
   },
   "devDependencies": {
     "eslint": "^6.8.0",