Update devDependencies and gems and switch to npm-run-all2

It's better maintained.

.stylelintrc → .stylelintrc.json

@@ -2,6 +2,8 @@
   "extends": [
     "stylelint-config-twbs-bootstrap"
   ],
+  "reportInvalidScopeDisables": true,
+  "reportNeedlessDisables": true,
   "rules": {
     "no-duplicate-selectors": true,
     "property-no-vendor-prefix": null,

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.1)
+    addressable (2.8.4)
       public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
     concurrent-ruby (1.2.2)
@@ -12,9 +12,9 @@ GEM
     eventmachine (1.2.7-x64-mingw32)
     ffi (1.15.5)
     forwardable-extended (2.6.0)
-    google-protobuf (3.22.2)
+    google-protobuf (3.23.1)
     http_parser.rb (0.8.0)
-    i18n (1.12.0)
+    i18n (1.13.0)
       concurrent-ruby (~> 1.0)
     jekyll (4.3.2)
       addressable (~> 2.4)
@@ -57,14 +57,14 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (4.1.0)
+    rouge (4.1.1)
     safe_yaml (1.0.5)
-    sass-embedded (1.60.0)
+    sass-embedded (1.62.1)
       google-protobuf (~> 3.21)
       rake (>= 10.0.0)
-    sass-embedded (1.60.0-x64-mingw-ucrt)
+    sass-embedded (1.62.1-x64-mingw-ucrt)
       google-protobuf (~> 3.21)
-    sass-embedded (1.60.0-x64-mingw32)
+    sass-embedded (1.62.1-x64-mingw32)
       google-protobuf (~> 3.21)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
@@ -84,4 +84,4 @@ DEPENDENCIES
   wdm (~> 0.1.1)
 
 BUNDLED WITH
-   2.4.9
+   2.4.13

docs/_sass/_syntax.scss

@@ -1,3 +1,5 @@
+// stylelint-disable declaration-block-single-line-max-declarations
+
 .hll { background-color: #ffc; }
 .c { color: #727272; }
 .k { color: #069; }