Fix broken master issue due to stylelint errors

app/assets/stylesheets/framework/spinner.scss

 @mixin spinner-color($color) {
-  border-color: rgba($color, .25);
+  border-color: rgba($color, 0.25);
   border-top-color: $color;
 }
@@ -25,7 +25,7 @@
   position: relative;
   margin: 0 auto;
   animation-name: spinner-rotate;
-  animation-duration: .6s;
+  animation-duration: 0.6s;
   animation-timing-function: linear;
   animation-iteration-count: infinite;
   border-style: solid;