compiler should filter out duplicated attrs

[LuLaValva]

x/packages/translator/src/visitors/tag/native-tag.ts

Line 156 in 86e1c04

// TODO: this should iterate backward and filter out duplicated attrs.

In HTML, first attribute value takes precendent, but Marko follows the rules of object properties (last property takes precedent), so we need to filter out duplicates to ensure the same behavior between the two.