create mode 100644 TODO.md
 delete mode 100644 src/Markdown.d.ts
 create mode 100644 src/Markdown.ts
 delete mode 100644 src/Markdown.tsx
 delete mode 100644 src/Memoizer.d.ts
 delete mode 100644 src/mod.d.ts
 delete mode 100644 src/mod.ts
 delete mode 100644 src/strings.d.ts
 create mode 100644 src/unist.ts
 delete mode 100644 tests/index.test.ts