Alignment with Carbon version 10.27 (#495)

* chore(deps-dev): bump devDependencies

* docs: update number of available carbon icons

* feat(notification): distinguish dispatched close event between click/timeout

* fix(notification): prevent class from being overriden by $$restProps

* docs(notification): improve example body copy

* fix(notification): remove notificationType prop

* refactor(notification): resolve svelte file in imports

* fix(notification): prevent class from being overridden by $$restProps

* feat(notification): update TS signature for dispatched close event

* docs: update contributing

* fix(loading): adjust spinner styles

* feat(tag): support custom icon variant

* feat(tile): add optional expand/collapse icon labels to ExpandableTile

* feat(code-snippet): support disabled state for single and multi-line types

* fix(code-snippet): remove impossible class directive

* fix(code-snippet): showMoreLess button size should be "field", not "small"

* fix(password-input): disable visibility button

- set default values for tooltipAlignment, tooltipPosition

* fix(text-input): add missing warning field wrapper class

* feat(button): infer hasIconOnly using $$slots API

- requires Svelte version >=3.25

* docs(button): add danger tertiary, icon-only example

* feat(button): set default values for tooltip alignment, position

* docs: document dynamic theming

* fix(modal): correctly set class props #482

* fix(form): forward submit event in FluidForm #487

* feat(dropdown): support warning state

* feat(multi-select): support warning state

* fix(multi-select): prevent dropdown from opening if disabled

* feat(number-input): support warning state

* chore(deps-dev): upgrade devDependencies

* docs:  bump @carbon/themes, carbon-components

* refactor(data-table): co-locate DataTableSkeleton with DataTable

* docs: update number of pictograms

* fix(password-input): add missing "bx--btn" class to visibility toggle

* docs: increase z-index for component preview

src/Dropdown/Dropdown.svelte

@@ -54,6 +54,12 @@
   /** Specify the invalid state text */
   export let invalidText = "";
 
+  /** Set to `true` to indicate an warning state */
+  export let warn = false;
+
+  /** Specify the warning state text */
+  export let warnText = "";
+
   /** Specify the helper text */
   export let helperText = "";
 
@@ -82,7 +88,8 @@
   export let ref = null;
 
   import { createEventDispatcher } from "svelte";
-  import WarningFilled16 from "carbon-icons-svelte/lib/WarningFilled16";
+  import WarningFilled16 from "carbon-icons-svelte/lib/WarningFilled16/WarningFilled16.svelte";
+  import WarningAltFilled16 from "carbon-icons-svelte/lib/WarningAltFilled16/WarningAltFilled16.svelte";
   import {
     ListBox,
     ListBoxMenu,
@@ -148,8 +155,7 @@
     id="{id}"
     name="{name}"
     aria-label="{$$props['aria-label']}"
-    class="bx--dropdown {invalid && 'bx--dropdown--invalid'}
-      {open && 'bx--dropdown--open'}
+    class="bx--dropdown {invalid && 'bx--dropdown--invalid'} {!invalid && warn && 'bx--dropdown--warning'} {open && 'bx--dropdown--open'}
       {size === 'sm' && 'bx--dropdown--sm'}
       {size === 'xl' && 'bx--dropdown--xl'}
       {inline && 'bx--dropdown--inline'}
@@ -163,10 +169,17 @@
     invalid="{invalid}"
     invalidText="{invalidText}"
     light="{light}"
+    warn="{warn}"
+    warnText="{warnText}"
   >
     {#if invalid}
       <WarningFilled16 class="bx--list-box__invalid-icon" />
     {/if}
+    {#if !invalid && warn}
+      <WarningAltFilled16
+        class="bx--list-box__invalid-icon bx--list-box__invalid-icon--warning"
+      />
+    {/if}
     <button
       bind:this="{ref}"
       class:bx--list-box__field="{true}"
@@ -220,7 +233,7 @@
       </ListBoxMenu>
     {/if}
   </ListBox>
-  {#if !inline && !invalid && helperText}
+  {#if !inline && !invalid && !warn && helperText}
     <div
       class:bx--form__helper-text="{true}"
       class:bx--form__helper-text--disabled="{disabled}"