(#415) Upgrade choco-theme to 0.8.1

This upgrades choco-theme to 0.8.1. With this upgrade, typescript and
purgecss were upgraded to remove any possible vulnerabilities. Other
than that, no specific changes were made although the compiled code
changed slightly due to additional dependencies being upgraded to minor
versions by removing and regenerating the yarn.lock file.

dist/css/atcb-overrides.css

@@ -5,7 +5,7 @@
  *
  * Style: Default
  *
- * Version: 2.6.19
+ * Version: 2.6.20
  * Creator: Jens Kuerschner (https://jekuer.com)
  * Project: https://github.com/add2cal/add-to-calendar-button
  * License: Elastic License 2.0 (ELv2) (https://github.com/add2cal/add-to-calendar-button/blob/main/LICENSE.txt)
@@ -1339,6 +1339,7 @@ a.atcb-modal-btn:not([disabled]):hover {
   filter: drop-shadow(0 0 3px rgba(255 255 255/80%));
   height: auto;
   padding: 8px 0;
+  text-align: center;
   transform: translate3d(0, 0, 0);
   width: 100%;
   z-index: 15000000;
@@ -1355,6 +1356,10 @@ a.atcb-modal-btn:not([disabled]):hover {
   position: absolute;
 }
 
+.atcb-modal-host-initialized #atcb-reference.atcb-dropup {
+  text-align: left;
+}
+
 /* :host-context(html.atcb-dark):host(.atcb-bodyScheme) #atcb-reference,
 :host-context(body.atcb-dark):host(.atcb-bodyScheme) #atcb-reference, */
 :host(.atcb-dark) #atcb-reference {
@@ -1368,7 +1373,7 @@ a.atcb-modal-btn:not([disabled]):hover {
   width: 150px;
   max-width: 100%;
   margin: auto;
-  display: block;
+  display: inline-block;
   text-decoration: none;
 }