Replace gulp with plain npm for linting.

assets/sass/components/button/_button.scss

@@ -14,7 +14,7 @@ button,
 [type='button'],
 [type='reset'],
 [type='submit'] {
-  // sass-lint:disable no-color-hex, no-color-literals
+  // stylelint-disable color-no-hex, color-named
   @extend %button--disabled;
   @include typeface(headings);
   @include margin-right(.75);
@@ -38,7 +38,7 @@ button,
   border-bottom-color: #b4b4b4;
   border-radius: 2px;
 
-  // sass-lint:disable no-vendor-prefixes
+  // stylelint-disable property-no-vendor-prefix
   // Correct the inability to style clickable types in iOS and Safari.
   -moz-appearance: button;
   -webkit-appearance: button;
@@ -53,7 +53,7 @@ button,
   &:-moz-focusring {
     outline: 1px dotted ButtonText;
   }
-  // sass-lint:enable no-vendor-prefixes
+  // sass-lint:enable property-no-vendor-prefix
 
   &:hover,
   &:focus,

assets/sass/components/cookieconsent/_cookieconsent.scss

@@ -3,11 +3,11 @@
 .cookieconsent {
   @include type-layout(s, 1);
   position: sticky;
-  bottom:  0;
+  bottom: 0;
   width: 100%;
   color: $warning;
   background-color: $warning-bg;
-  border-top:  4px solid $warning-border;
+  border-top: 4px solid $warning-border;
   text-align: center;
   transform: translateY(100vh);
   transition: all 130ms ease-in;

assets/sass/components/inline-sibling/_inline-sibling.scss

@@ -1,3 +1,5 @@
+// stylelint-disable selector-max-compound-selectors
+
 // Inline sibling
 //
 // An element that needs to appear inline with the content that follows.

assets/sass/components/watermark/_watermark.scss

@@ -14,7 +14,7 @@
   font-size: 75px;
   line-height: 1;
   text-align: center;
-  // sass-lint:disable no-color-literals
+  // stylelint-disable no-color-literals
   text-shadow: 0 0 1px rgba(0, 0, 0, .1);
   word-wrap: break-word;
 }

assets/sass/components/wireframe/_wireframe.scss

@@ -9,7 +9,6 @@ $with-wireframes: false !default;
 // variable: `$with-wireframes: true;`
 
 @if $with-wireframes {
-
   .wireframe,
   %wireframe {
     outline: 1px solid $border;
@@ -31,5 +30,4 @@ $with-wireframes: false !default;
       @extend %wireframe;
     }
   }
-
 }