added outline styles for keyboard nav

tailwind.js

@@ -457,6 +457,7 @@ module.exports = {
   width: {
     auto: 'auto',
     px: '1px',
+    '0': '0',
     '1': '0.25rem',
     '2': '0.5rem',
     '3': '0.75rem',
@@ -861,7 +862,7 @@ module.exports = {
     minHeight: ['responsive'],
     minWidth: ['responsive'],
     negativeMargin: ['responsive'],
-    opacity: ['responsive'],
+    opacity: ['responsive', 'hover'],
     outline: ['focus'],
     overflow: ['responsive'],
     padding: ['responsive'],