Update dependencies

Author: jsnanigans

package.json

@@ -45,18 +45,19 @@
     "babel-preset-env": "^1.6.1",
     "codacy-coverage": "^2.0.3",
     "css-loader": "^0.28.8",
-    "eslint": "^4.15.0",
+    "eslint": "^4.18.2",
     "extract-text-webpack-plugin": "^3.0.2",
     "jest": "^22.0.6",
     "prettier": "^1.10.2",
-    "rollup": "^0.55.1",
+    "rollup": "^0.56.3",
     "rollup-plugin-babel": "^3.0.3",
     "rollup-plugin-commonjs": "^8.3.0",
     "rollup-plugin-node-resolve": "^3.0.2",
     "rollup-watch": "^4.3.1",
     "webpack": "^3.10.0"
   },
   "dependencies": {
+    "eslint-plugin-html": "^4.0.2",
     "purgecss": "^0.20.0",
     "webpack-sources": "^1.1.0"
   }