Update Jest and Babel version.

Author: trekhleb

.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": ["env"]
+  "presets": ["@babel/preset-env"]
 }

package-lock.json

@@ -37,16 +37,16 @@
   },
   "homepage": "https://github.com/trekhleb/javascript-algorithms#readme",
   "devDependencies": {
-    "@types/jest": "^23.3.14",
-    "babel-cli": "^6.26.0",
-    "babel-preset-env": "^1.7.0",
+    "@babel/cli": "^7.2.3",
+    "@babel/preset-env": "^7.3.4",
+    "@types/jest": "^24.0.9",
     "eslint": "^5.15.1",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-jest": "^22.3.0",
     "eslint-plugin-jsx-a11y": "^6.2.1",
     "eslint-plugin-react": "^7.12.4",
-    "jest": "^23.6.0",
+    "jest": "^24.3.1",
     "pre-commit": "^1.2.2"
   },
   "dependencies": {}