typechecker v6.4.0

Copy the badge code for the latest version:

[![licenses](https://licenses.dev/b/npm/typechecker)](https://licenses.dev/npm/typechecker)

<a href="https://licenses.dev/npm/typechecker">
  <img src="https://licenses.dev/b/npm/typechecker" alt="licenses" />
</a>

Or the badge code for the 6.4.0 version:

[![licenses](https://licenses.dev/b/npm/typechecker/6.4.0)](https://licenses.dev/npm/typechecker/6.4.0)

<a href="https://licenses.dev/npm/typechecker/6.4.0">
  <img src="https://licenses.dev/b/npm/typechecker/6.4.0" alt="licenses" />
</a>