Update devDependencies.

package.json

@@ -50,39 +50,39 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "@babel/core": "^7.4.4",
+    "@babel/core": "^7.7.2",
     "@babel/plugin-external-helpers": "^7.2.0",
-    "@babel/plugin-transform-runtime": "^7.4.4",
-    "@babel/preset-env": "^7.4.4",
-    "@babel/preset-react": "^7.0.0",
+    "@babel/plugin-transform-runtime": "^7.6.2",
+    "@babel/preset-env": "^7.7.1",
+    "@babel/preset-react": "^7.7.0",
     "autoprefixer": "^8.6.1",
     "babel-eslint": "^8.2.3",
     "bannerjs": "^1.0.5",
     "classnames": "^2.2.5",
-    "colors-cli": "^1.0.13",
+    "colors-cli": "^1.0.26",
     "eslint": "^4.19.1",
     "eslint-config-airbnb": "^16.1.0",
-    "eslint-plugin-import": "^2.12.0",
-    "eslint-plugin-jsx-a11y": "^6.0.3",
-    "eslint-plugin-react": "^7.9.1",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-jsx-a11y": "^6.2.3",
+    "eslint-plugin-react": "^7.16.0",
     "gh-pages": "^1.2.0",
-    "highlight.js": "^9.12.0",
-    "husky": "^3.0.5",
-    "jest": "^24.8.0",
-    "less": "^3.0.4",
-    "parcel-bundler": "^1.12.3",
-    "parcel-plugin-markdown-string": "^1.4.0",
+    "highlight.js": "^9.16.2",
+    "husky": "^3.1.0",
+    "jest": "^24.9.0",
+    "less": "^3.10.3",
+    "parcel-bundler": "^1.12.4",
+    "parcel-plugin-markdown-string": "^1.4.2",
     "postcss-modules": "^1.1.0",
-    "puppeteer": "^1.14.0",
-    "react": "^16.7.0",
-    "react-dom": "^16.7.0",
+    "puppeteer": "^1.20.0",
+    "react": "^16.12.0",
+    "react-dom": "^16.12.0",
     "react-markdown": "^3.3.2",
-    "rimraf": "^2.6.3",
-    "rollup": "^1.11.0",
-    "rollup-plugin-babel": "^4.3.2",
+    "rimraf": "^2.7.1",
+    "rollup": "^1.27.4",
+    "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-commonjs": "^9.3.4",
-    "rollup-plugin-node-resolve": "^4.2.3",
-    "uglify-js": "^3.4.0",
+    "rollup-plugin-node-resolve": "^4.2.4",
+    "uglify-js": "^3.6.9",
     "zlib": "^1.0.5"
   }
 }