styles: Enable most stylelint-config-recommended rules.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

package.json

@@ -103,6 +103,7 @@
     "source-map": "^0.6.1",
     "stylelint": "^13.0.0",
     "stylelint-config-prettier": "^8.0.2",
+    "stylelint-config-recommended": "^3.0.0",
     "svgo": "^1.2.2",
     "swagger-parser": "^10.0.0",
     "typescript": "^3.5.1",

stylelint.config.js

@@ -1,8 +1,19 @@
 "use strict";
 
 module.exports = {
-    extends: ["stylelint-config-prettier"],
+    extends: ["stylelint-config-recommended", "stylelint-config-prettier"],
     rules: {
+        // Add some exceptions for recommended rules
+        "at-rule-no-unknown": [true, {ignoreAtRules: ["extend"]}],
+        "property-no-unknown": [true, {ignoreProperties: [/^mso-/, "user-drag"]}],
+
+        // Disable recommended rules we don't comply with yet
+        "declaration-block-no-duplicate-properties": null,
+        "declaration-block-no-shorthand-property-overrides": null,
+        "font-family-no-missing-generic-family-keyword": null,
+        "no-descending-specificity": null,
+        "no-duplicate-selectors": null,
+
         // Stylistic rules for CSS.
         "function-whitespace-after": "always",
 

version.py

@@ -44,4 +44,4 @@ API_FEATURE_LEVEL = 27
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = '95.1'
+PROVISION_VERSION = '95.2'

yarn.lock

@@ -11345,6 +11345,11 @@ stylelint-config-prettier@^8.0.2:
   resolved "https://registry.yarnpkg.com/stylelint-config-prettier/-/stylelint-config-prettier-8.0.2.tgz#da9de33da4c56893cbe7e26df239a7374045e14e"
   integrity sha512-TN1l93iVTXpF9NJstlvP7nOu9zY2k+mN0NSFQ/VEGz15ZIP9ohdDZTtCWHs5LjctAhSAzaILULGbgiM0ItId3A==
 
+stylelint-config-recommended@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/stylelint-config-recommended/-/stylelint-config-recommended-3.0.0.tgz#e0e547434016c5539fe2650afd58049a2fd1d657"
+  integrity sha512-F6yTRuc06xr1h5Qw/ykb2LuFynJ2IxkKfCMf+1xqPffkxh0S09Zc902XCffcsw/XMFq/OzQ1w54fLIDtmRNHnQ==
+
 stylelint@^13.0.0:
   version "13.6.1"
   resolved "https://registry.yarnpkg.com/stylelint/-/stylelint-13.6.1.tgz#cc1d76338116d55e8ff2be94c4a4386c1239b878"