chore(deps): update all major dependencies

Author: renovate-bot

package.json

@@ -42,7 +42,7 @@
     "@types/react-cache": "2.0.1",
     "@types/react-dom": "16.8.4",
     "@types/react-helmet": "5.0.8",
-    "@types/react-router-dom": "4.3.3",
+    "@types/react-router-dom": "5.1.2",
     "@types/styled-components": "4.1.14",
     "@types/workbox-sw": "4.2.0",
     "@typescript-eslint/eslint-plugin": "2.0.0",
@@ -76,7 +76,7 @@
     "prettier": "1.18.2",
     "resolve-url-loader": "3.1.0",
     "rimraf": "3.0.0",
-    "sass-loader": "7.2.0",
+    "sass-loader": "8.0.0",
     "style-loader": "1.0.0",
     "svg-sprite-loader": "4.1.3",
     "svgo": "1.3.0",