chore: dependencies update

- update: `@coreui/coreui` to `2.0.21`
- update: `chart.js` to `2.7.3`
- update: `flag-icon-css` to `3.2.1`
- update: `autoprefixer` to `9.3.1`
- update: `browser-sync` to `2.26.3`
- update: `eslint` to `5.7.0`
- update: `eslint-plugin-compat` to `2.6.2`
- update: `js-beautify` to `1.8.8`
- update: `node-sass` to `4.9.4`
- update: `postcss-cli` to `6.0.1`
- update: `stylelint-scss` to `3.3.2`

Author: xidedix

package.json

@@ -63,12 +63,12 @@
     "watch-pug": "nodemon -e pug -x \"npm run pug\""
   },
   "dependencies": {
-    "@coreui/coreui": "^2.0.12",
+    "@coreui/coreui": "^2.0.21",
     "@coreui/coreui-plugin-chartjs-custom-tooltips": "1.2.0",
     "@coreui/icons": "0.3.0",
     "bootstrap": "4.1.3",
-    "chart.js": "^2.7.2",
-    "flag-icon-css": "3.2.0",
+    "chart.js": "^2.7.3",
+    "flag-icon-css": "^3.2.1",
     "font-awesome": "4.7.0",
     "jquery": "3.3.1",
     "pace-progress": "1.0.2",
@@ -81,30 +81,30 @@
     "@babel/core": "^7.1.2",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
     "@babel/preset-env": "^7.1.0",
-    "autoprefixer": "^9.1.5",
+    "autoprefixer": "^9.3.1",
     "babel-eslint": "^10.0.1",
     "babel-plugin-transform-es2015-modules-strip": "^0.1.1",
-    "browser-sync": "^2.24.7",
+    "browser-sync": "^2.26.3",
     "chalk": "^2.4.1",
     "clean-css-cli": "^4.2.1",
     "copyfiles": "^2.1.0",
     "cross-env": "^5.2.0",
-    "eslint": "^5.6.1",
-    "eslint-plugin-compat": "^2.5.1",
+    "eslint": "^5.7.0",
+    "eslint-plugin-compat": "^2.6.2",
     "foreach-cli": "^1.8.1",
-    "js-beautify": "^1.8.6",
-    "node-sass": "^4.9.3",
+    "js-beautify": "^1.8.8",
+    "node-sass": "^4.9.4",
     "nodemon": "^1.18.4",
     "npm-run-all": "^4.1.3",
-    "postcss-cli": "^6.0.0",
+    "postcss-cli": "^6.0.1",
     "pug": "^2.0.3",
     "rimraf": "^2.6.2",
     "shelljs": "^0.8.2",
     "stylelint": "^9.6.0",
     "stylelint-config-recommended-scss": "^3.2.0",
     "stylelint-config-standard": "^18.2.0",
     "stylelint-order": "^1.0.0",
-    "stylelint-scss": "^3.3.1"
+    "stylelint-scss": "^3.3.2"
   },
   "engines": {
     "node": ">=6"