refactor(scout-451): added stylelint (#448)

.stylelintrc

@@ -0,0 +1,14 @@
+{
+  "processors": [
+    "stylelint-processor-styled-components"
+  ],
+  "extends": [
+    "stylelint-config-recommended",
+    "stylelint-config-styled-components"
+  ],
+  "rules": {
+    "block-no-empty": null,
+    "selector-type-no-unknown": null,
+    "no-descending-specificity": null,
+  }
+}

package.json

@@ -9,6 +9,7 @@
     "test:watch": "react-scripts test --testMatch '**/__tests__/*'",
     "eject": "react-scripts eject",
     "lint": "eslint \"src/**/*.{ts,tsx}\"",
+    "stylelint": "stylelint  \"src/**/*.{ts,tsx}\"",
     "storybook": "start-storybook -p 9009 -s public",
     "build-storybook": "build-storybook -s public"
   },
@@ -70,6 +71,10 @@
     "husky": "^4.2.5",
     "lint-staged": "^10.2.7",
     "storybook-addon-styled-component-theme": "^1.3.0",
+    "stylelint": "^13.13.1",
+    "stylelint-config-recommended": "^5.0.0",
+    "stylelint-config-styled-components": "^0.1.1",
+    "stylelint-processor-styled-components": "^1.10.0",
     "ts-loader": "^7.0.5",
     "typescript": "^4.1.2"
   },