Setup CI tests (#100)

* use @xarc/xrun to streamline tasks in an imperative manner

* add lint-staged/husky for git hook tasks

* run prettier across all files

* fixing tests

* add ci test workflow

* add a ci workflow

* remove precommit in favor of husky

* add .prettierrc.js

* reformat with prettier

assets/less/bootstrap/close.less

@@ -2,7 +2,6 @@
 // Close icons
 // --------------------------------------------------
 
-
 .close {
   float: right;
   font-size: (@font-size-base * 1.5);
@@ -10,14 +9,14 @@
   line-height: 1;
   color: @close-color;
   text-shadow: @close-text-shadow;
-  .opacity(.2);
+  .opacity(0.2);
 
   &:hover,
   &:focus {
     color: @close-color;
     text-decoration: none;
     cursor: pointer;
-    .opacity(.5);
+    .opacity(0.5);
   }
 
   // Additional properties for button version