Breaking changes

• New extension: dirvish-subtree
• New extension: dirvish-collapse
• New extension: dirvish-emerge
• New extension: dirvish-fd
• New extension: dirvish-narrow

For other changes and bug fixes, see the CHANGELOG

Notes

The lazy rendering and async I/O mechanism got a lot of improvements, Dirvish
even outperforms Dired in terms of opening big directories.