Add support for "important" option in "options" section of config

Doesn't apply to `.container` since it's an oddball non-utility.
tailwindlabs · adamwathan · Nov 5, 2017 · Nov 5, 2017 · Nov 10, 2017 · Nov 10, 2017
commit 733a43ae2d3a97c6ad1c99b1ec2c38813a3f42cb
diff --git a/__tests__/importantAtRule.test.js b/__tests__/importantAtRule.test.js
diff --git a/src/lib/generateUtilities.js b/src/lib/generateUtilities.js
@@ -85,6 +85,10 @@ export default function(config) {
           ]),
         })
 
+        if (_.get(config, 'options.important', false)) {
+          utilities.walkDecls(decl => (decl.important = true))
+        }
+
         const tailwindClasses = postcss.root({
           nodes: [...container(config), responsive(utilities)],
         })

diff --git a/src/lib/substituteImportantAtRules.js b/src/lib/substituteImportantAtRules.js