v10.4.0

Feature/zoo input tag enhancements (#54)

* zoo-modal improvements:
 - add `zoo-modal-z-index` CSS variable to control z-index in case of conflict with other components
 - ptional `button-closeable` attribute to prevent closing of modal when clicking on box overlay area
 - fix duplicated click event listener on added on every modal opening
* input-tag-padding CSS variables
* - fix attribute for custom values to be `data-` prefixed
  - add clearSelection method for clearing input tag
  - CSS fixes
* - readme update

10.3.4

10.3.4

zoo-modal:

• added CSS variable zoo-modal-z-index to change predefined z-index in case of conflict with some other 3rd party components
• added optional button-closeable attribute to prevent closing of modal when clicking on box overlay area