Add missing atom.deserializers prefix
Add missing atom.deserializers prefix

ArnaudRinquin/markdown-preview,grimmer0125/markdown-preview-kramdown,tkssharma/markdown-preview,atom/markdown-preview,Galadirith/markdown-preview,sctlee/markdown-preview,rugk/markdown-preview,makyo/markdown-preview,danielgtaylor/atom-api-blueprint-preview