Update npm packages.

Author: trekhleb

package-lock.json

@@ -37,15 +37,15 @@
   },
   "homepage": "https://github.com/trekhleb/javascript-algorithms#readme",
   "devDependencies": {
-    "@types/jest": "^23.3.10",
+    "@types/jest": "^23.3.14",
     "babel-cli": "^6.26.0",
     "babel-preset-env": "^1.7.0",
-    "eslint": "^5.9.0",
+    "eslint": "^5.15.1",
     "eslint-config-airbnb": "^17.1.0",
-    "eslint-plugin-import": "^2.14.0",
-    "eslint-plugin-jest": "^22.1.0",
-    "eslint-plugin-jsx-a11y": "^6.1.2",
-    "eslint-plugin-react": "^7.11.1",
+    "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",
     "pre-commit": "^1.2.2"
   },