95% faster local image url getting

added localImageURL() test

StickerSlackTests/StickerSlackTests.swift

@@ -10,11 +10,17 @@ import Testing
 struct StickerSlackTests {
 	var hoarder = EmojiHoarder()
 	
-	@Test func example() async throws {
+	@Test func stickerConversion() async throws {
 		// Write your test here and use APIs like `#expect(...)` to check expected conditions.
 		for emoji in hoarder.emojis {
 			print(emoji.sticker)
 		}
 	}
 	
+	@Test func localImageURL() async throws {
+		for emoji in hoarder.emojis {
+			print(emoji.localImageURL)
+		}
+	}
+	
 }