v0.12.0

• fix: do not remove text language from codeblocks (3b6ca5b)
• chore: upgrade deps (2684dd2)
• feat(parse): allow disabling heading extraction (4420709)
• fix: stringifyMarkdown auto-import (#311) (32225ae)
• fix: text is default language for codeblocks (#309) (b7dc03e)
• chore: upgrade deps (febcb01)
• chore: upgrade deps (b608fbd)