Add changeset (and remove extra/unused functions in pivot)

Author: techniq

.changeset/olive-elephants-rule.md

@@ -0,0 +1,5 @@
+---
+"layerchart": patch
+---
+
+Add pivotLonger() and pivotWider() to top-level exports. Add `layerchart/utils` export for additional utils

packages/layerchart/src/lib/utils/pivot.ts

@@ -1,13 +1,5 @@
 import { group } from 'd3-array';
 
-export function getAccessor(key: string) {
-  if (typeof key === 'function') {
-    return key;
-  } else {
-    return (d: any) => d[key];
-  }
-}
-
 /**
  * Pivot longer (columns to rows)
  *  - see: https://observablehq.com/d/3ea8d446f5ba96fe
@@ -34,11 +26,3 @@ export function pivotWider(data: any[], column: string, name: string, value: str
       Object.fromEntries([[column, columnVal]].concat(items.map((d) => [d[name], d[value]])))
   );
 }
-
-export function first(items: any[]) {
-  return items[0];
-}
-
-export function last(items: any[]) {
-  return items[items.length - 1];
-}