fix(stylelint): improve rules

Author: jpatovh

templates/.stylelintrc.json

@@ -7,9 +7,9 @@
     "declaration-colon-space-after": "always",
     "declaration-no-important": true,
     "indentation": 2,
-    "max-nesting-depth": 3,
-    "selector-max-specificity": "0,3,3",
-    "scss/at-extend-no-missing-placeholder": true,
+    "max-nesting-depth": 5,
+    "selector-max-specificity": "0,5,5",
+    "scss/at-extend-no-missing-placeholder": null,
     "scss/selector-no-redundant-nesting-selector": true,
     "at-rule-no-vendor-prefix": true,
     "media-feature-name-no-vendor-prefix": true,