⬆ Upgrade dev dependencies

package.json

@@ -59,10 +59,10 @@
     "@babel/preset-env": "^7.2.3",
     "@babel/preset-react": "^7.0.0",
     "@testing-library/jest-dom": "^5.1.1",
-    "@testing-library/react": "^9.4.0",
+    "@testing-library/react": "^10.0.4",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^10.0.1",
-    "babel-jest": "^25.1.0",
+    "babel-jest": "^26.0.0",
     "babel-loader": "^8.0.5",
     "codemirror": "^5.42.0",
     "css-loader": "^3.4.2",
@@ -70,14 +70,14 @@
     "eslint-plugin-jest": "^23.7.0",
     "eslint-plugin-react": "^7.14.2",
     "glob": "^7.1.4",
-    "html-loader": "^0.5.5",
+    "html-loader": "^1.1.0",
     "html-webpack-harddisk-plugin": "^1.0.1",
-    "html-webpack-plugin": "^3.0.7",
-    "jest": "^25.1.0",
+    "html-webpack-plugin": "^4.3.0",
+    "jest": "^26.0.0",
     "prettier": "^1.18.2",
     "raw-loader": "^4.0.0",
     "react": "^16.8.6",
-    "react-codemirror2": "^6.0.0",
+    "react-codemirror2": "^7.1.0",
     "react-docgen": "^5.2.1",
     "react-dom": "^16.8.6",
     "react-hot-loader": "^4.0.0",