v1.5.0

• Added field searching "field-name:query" example at https://tom-select.js.org/examples/contacts/
• Build cjs
• Bug fixes
  • prevent extra onchange events
  • remove inline css to fix CSP issues
  • fix option.selected vs getAttribute('selected') issue
  • don't overwrite background color css
  • fix item creation when option_create template is null
  • should not create item on tab unless selectOnTab=true
  • fix setup when optgroup_header template is null