Upgrade to Gatsby v2

.stylelintrc

@@ -0,0 +1,25 @@
+{
+  "extends": "stylelint-config-recommended-scss",
+  "rules": {
+    "color-named": "never",
+    "font-family-name-quotes": "always-where-required",
+    "font-weight-notation": "named-where-possible",
+    "function-url-no-scheme-relative": true,
+    "function-url-quotes": "always",
+    "string-quotes": "single",
+    "value-keyword-case": "lower",
+    "unit-blacklist": [],
+    "max-empty-lines": 2,
+    "no-descending-specificity": true,
+    "no-duplicate-selectors": true,
+    "font-family-no-missing-generic-family-keyword": null,
+    "property-no-unknown": [true, {
+      ignoreProperties: ["/^lost-/"]
+    }]
+  },
+  "ignoreFiles": [
+    "node_modules/*",
+    "src/assets/**"
+  ],
+  "defaultSeverity": "error"
+}