fix: remove aria-required attribute from DOM when false

fix: use HostListener for dragover event

chore: update bun lockfile

main <= feature/release v19 (#86)

fix(#97): accept validator case insensitive

Fix issue where accept validator return false if file extension is
uppercase. Accept validator should be case insensitive.

Closes #97.

🔧 fix(#85): set accept host binding.

feat(#79): add relative path property to keep tree structures.

🎉 feat: release ngx-dropzone v18

🔧 fix(#75): make validator accept null values.

🎉 feat(#60): ignore chrome's file limit per dropped directory.