Change webpack devtool setting to source-map

config/webpack.config.dev.js

@@ -37,7 +37,7 @@ const env = getClientEnvironment(publicUrl);
 module.exports = {
   // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
   // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
-  devtool: 'cheap-module-source-map',
+  devtool: 'source-map',
   // These are the "entry points" to our application.
   // This means they will be the "root" imports that are included in JS bundle.
   // The first two entry points enable "hot" CSS and auto-refreshes for JS.

package.json

@@ -22,8 +22,11 @@
   },
   "dependencies": {
     "autoprefixer": "7.1.6",
-    "babel-jest": "20.0.3",
+    "babel-cli": "^6.26.0",
+    "babel-core": "^6.26.3",
+    "babel-jest": "^24.9.0",
     "babel-loader": "7.1.2",
+    "babel-preset-env": "^1.7.0",
     "babel-preset-react-app": "^3.1.2",
     "case-sensitive-paths-webpack-plugin": "2.1.1",
     "chalk": "1.1.3",
@@ -35,18 +38,18 @@
     "fork-ts-checker-webpack-plugin": "^0.2.8",
     "fs-extra": "3.0.1",
     "html-webpack-plugin": "2.29.0",
-    "jest": "20.0.4",
+    "jest": "^24.9.0",
     "object-assign": "4.1.1",
     "postcss-flexbugs-fixes": "3.2.0",
     "postcss-loader": "2.0.8",
     "promise": "8.0.1",
     "raf": "3.4.0",
-    "source-map-loader": "^0.2.1",
     "react-dev-utils": "^5.0.2",
     "resolve": "1.6.0",
+    "source-map-loader": "^0.2.1",
     "style-loader": "0.19.0",
     "sw-precache-webpack-plugin": "0.11.4",
-    "ts-jest": "22.0.1",
+    "ts-jest": "^24.0.2",
     "ts-loader": "^2.3.7",
     "tsconfig-paths-webpack-plugin": "^2.0.0",
     "tslint": "^5.7.0",