update dependencies

package.json

@@ -33,7 +33,7 @@
     "@babel/preset-stage-2": "^7.0.0",
     "@babel/runtime": "^7.4.5",
     "audit-ci": "^2.0.0",
-    "autoprefixer": "^9.5.1",
+    "autoprefixer": "^9.6.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^10.0.1",
     "babel-jest": "^24.7.1",
@@ -42,7 +42,7 @@
     "connect-history-api-fallback": "^1.6.0",
     "copy-webpack-plugin": "^5.0.3",
     "css-loader": "^2.1.0",
-    "dart-sass": "^1.19.0",
+    "dart-sass": "^1.20.3",
     "eslint": "^5.16.0",
     "eslint-config-airbnb-base": "^13.0.0",
     "eslint-plugin-html": "^5.0.5",
@@ -65,7 +65,7 @@
     "postcss-loader": "^3.0.0",
     "postcss-scss": "^2.0.0",
     "regenerator-runtime": "^0.13.2",
-    "rollup": "^1.13.0",
+    "rollup": "^1.13.1",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-flow-no-whitespace": "^1.0.0",
@@ -75,13 +75,13 @@
     "sass-loader": "^7.0.3",
     "style-loader": "^0.23.1",
     "terser": "^4.0.0",
-    "tippy.js": "^4.3.1",
+    "tippy.js": "^4.3.3",
     "vue": "^2.6.10",
     "vue-loader": "^15.7.0",
     "vue-router": "^3.0.6",
     "vue-style-loader": "^4.1.0",
     "vue-template-compiler": "^2.6.10",
-    "webpack": "^4.32.2",
+    "webpack": "^4.33.0",
     "webpack-dev-middleware": "^3.7.0",
     "webpack-hot-middleware": "^2.25.0",
     "webpack-manifest-plugin": "^2.0.4",