chore(deps): update dependency kanboard/kanboard to v1.2.19 (#31)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [kanboard/kanboard](https://github.com/kanboard/kanboard) | patch | `v1.2.18` -> `v1.2.19` |

---

### Release Notes

<details>
<summary>kanboard/kanboard</summary>

### [`v1.2.19`](https://github.com/kanboard/kanboard/releases/v1.2.19)

[Compare Source](https://github.com/kanboard/kanboard/compare/v1.2.18...v1.2.19)

-   Trim user agent for RememberMe sessions because MySQL use a varchar(255) column
-   Update Docker image to Alpine 3.13.4
-   Added "Deutsch (du)" language
-   Fixed `createLdapUser` API procedure when LDAP groups are not configured
-   Write RememberMe cookie only after the two-factor code has been validated
-   Avoid warning when removing a plugin zip archive
-   Update Hungarian translation
-   Add new hook `model:task:duplication:aftersave`
-   Bump symfony/stopwatch from 5.2.3 to 5.2.4
-   Bump pimple/pimple from 3.3.1 to 3.4.0
-   Bump gregwar/captcha from 1.1.8 to 1.1.9
-   Added new analytic component: "Estimated vs actual time per column"
-   Do not retain any changes between shared plugins variables
-   Display number of tasks according to filter
-   Add support for LDAP protocol/host/port configuration by URL; make `BASE_DN` optional
    -   `ldap_connect($host, $port)` function signature is deprecated
    -   Querying an AD Global Catalog across an entire forest requires an empty base DN
-   Use an absolute file path in `AssetHelper` class for `css()` & `js()` functions
-   Remove whitespace at the end of `APP_VERSION` constant
-   Add IP address to authentication error logs
-   Add interpolation expressions to e-mail subject in automatic action "Send a task by email to someone"
    -   For example: `Email subject = {{column_title}}: {{title}} (#{{id}})`
-   Add Hungarian Forint to the list of currencies

</details>

---

### Renovate configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻️ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

Reviewed-on: docker/kanboard#31
Co-authored-by: Renovator Bot <renovator@rknet.org>
Co-committed-by: Renovator Bot <renovator@rknet.org>

Dockerfile

@@ -9,7 +9,7 @@ LABEL org.opencontainers.image.documentation="https://gitea.rknet.org/docker/kan
 
 ARG BUILD_VERSION
 # renovate: datasource=github-releases depName=kanboard/kanboard
-ENV KANBOARD_VERSION="${BUILD_VERSION:-v1.2.18}"
+ENV KANBOARD_VERSION="${BUILD_VERSION:-v1.2.19}"
 
 ADD overlay/ /