react packages updated to 16.13.0; rm mocha, eslint

package.json

@@ -24,8 +24,8 @@
         "date-fns": "^2.10.0",
         "lodash": "^4.17.15",
         "next": "^9.3.0",
-        "react": "^16.12.0",
-        "react-dom": "^16.12.0",
+        "react": "^16.13.0",
+        "react-dom": "^16.13.0",
         "sitemap": "^1.5.0",
         "use-media": "^1.4.0"
     },
@@ -36,13 +36,7 @@
         "@types/react": "^16.9.12",
         "@zeit/next-css": "^1.0.1",
         "@zeit/next-sass": "^1.0.1",
-        "eslint": "^4.18.2",
-        "eslint-config-standard": "^6.2.1",
-        "eslint-plugin-promise": "^3.8.0",
-        "eslint-plugin-react": "^7.16.0",
-        "eslint-plugin-standard": "^2.0.1",
         "feed": "^4.0.0",
-        "mocha": "^6.2.2",
         "node-sass": "^4.13.0",
         "should": "^8.2.2",
         "typescript": "^3.7.5"