fix: use literal instead of litteral

Related to @h2x/parse@1.1.0

Author: gregberge

packages/core/src/h2x/emSize.js

@@ -4,7 +4,7 @@ const makeSizeAttr = name => {
   const attr = new JSXAttribute()
   attr.name = name
   attr.value = '1em'
-  attr.litteral = false
+  attr.literal = false
   return attr
 }
 

packages/core/src/h2x/svgRef.js

@@ -11,7 +11,7 @@ const svgRef = () => () => ({
           const props = new JSXAttribute()
           props.name = 'ref'
           props.value = 'svgRef'
-          props.litteral = true
+          props.literal = true
           path.node.attributes.push(props)
           path.replace(path.node)
         }