Fix HTML validation of the input field (#16)

* Add handling of aria-expanded attribute on the input field.

role="combobox" requires aria-expanded to pass HTML validation.

* Set autocorrect only if the field supports it.

This ensures the result is valid HTML.

fix: remove race conditions between timeouts and callbacks.

fix issues related to this PR: vufind-org/vufind#3064

docs: version bump (package.json)

version: bump 2.1.6.

version: bump 2.1.5.

version: 2.1.4.

Fix branch name in link.

Switch to input event to support pasting and edge-cases.

Bugfixes

- Positioning corrections
- Prevent form submission