Added size getter for cache

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.30.0",
+	"version": "0.30.2",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/cache.ts

@@ -31,6 +31,8 @@ export class Cache<K extends string | number | symbol, T> {
 	/** Await initial loading */
 	loading = new Promise<void>(r => this._loading = r);
 
+	get size() { return this.store.keys().toArray().length }
+
 	/**
 	 * Create new cache
 	 * @param {keyof T} key Default property to use as primary key