Update devDependencies.

package.json

@@ -100,15 +100,15 @@
     "@babel/core": "^7.0.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
-    "autoprefixer": "^9.1.3",
+    "autoprefixer": "^9.1.5",
     "babel-eslint": "9.0.0",
-    "babel-plugin-istanbul": "^5.0.1",
+    "babel-plugin-istanbul": "^5.1.0",
     "broken-link-checker": "^0.7.8",
     "bundlesize": "^0.15.3",
     "clean-css-cli": "^4.2.1",
     "coveralls": "^3.0.2",
     "cross-env": "^5.2.0",
-    "eslint": "^5.4.0",
+    "eslint": "^5.5.0",
     "glob": "^7.1.3",
     "htmllint-cli": "^0.0.7",
     "http-server": "^0.11.1",
@@ -116,31 +116,31 @@
     "karma": "^3.0.0",
     "karma-browserstack-launcher": "^1.3.0",
     "karma-chrome-launcher": "^2.2.0",
-    "karma-coverage-istanbul-reporter": "^2.0.2",
+    "karma-coverage-istanbul-reporter": "^2.0.4",
     "karma-detect-browsers": "^2.3.2",
     "karma-firefox-launcher": "^1.1.0",
     "karma-qunit": "^2.1.0",
     "karma-sinon": "^1.0.5",
     "node-sass": "^4.9.3",
-    "nodemon": "^1.18.3",
+    "nodemon": "^1.18.4",
     "npm-run-all": "^4.1.3",
     "popper.js": "^1.14.4",
     "postcss-cli": "^6.0.0",
     "qunit": "^2.6.2",
-    "rollup": "^0.65.0",
-    "rollup-plugin-babel": "^4.0.2",
-    "rollup-plugin-node-resolve": "^3.3.0",
+    "rollup": "^0.65.2",
+    "rollup-plugin-babel": "^4.0.3",
+    "rollup-plugin-node-resolve": "^3.4.0",
     "shelljs": "^0.8.2",
     "shx": "^0.3.2",
-    "sinon": "^6.1.5",
+    "sinon": "^6.2.0",
     "sri-toolbox": "^0.2.0",
     "stylelint": "^9.5.0",
     "stylelint-config-recommended-scss": "^3.2.0",
     "stylelint-config-standard": "^18.2.0",
     "stylelint-order": "^1.0.0",
     "stylelint-scss": "^3.3.0",
-    "uglify-js": "^3.4.8",
-    "vnu-jar": "^18.7.23",
+    "uglify-js": "^3.4.9",
+    "vnu-jar": "^18.8.29",
     "workbox-build": "^3.4.1"
   },
   "engines": {