chore: add jimp dependency, icon padding script, and update configuration

node_modules/@jimp/plugin-shadow/test/shadow.test.js

@@ -0,0 +1,32 @@
+import { Jimp, mkJGD, getTestDir } from "@jimp/test-utils";
+import configure from "@jimp/custom";
+import resize from "@jimp/plugin-resize";
+import blur from "@jimp/plugin-blur";
+import expect from "@storybook/expect";
+
+import shadow from "../src";
+
+const jimp = configure({ plugins: [shadow, resize, blur] }, Jimp);
+
+describe("Shadow", () => {
+  it("creates a shadow", async () => {
+    const expectedImg = await jimp.read(
+      getTestDir(__dirname) + "/images/shadow.png"
+    );
+    const testImage = await jimp.read(
+      mkJGD(
+        "          ",
+        "    ◆◆    ",
+        "   ◆▦▦◆   ",
+        "  ◆▦▦▦▦◆  ",
+        "   ◆▦▦◆   ",
+        "    ◆◆    ",
+        "          "
+      )
+    );
+
+    expect(testImage.shadow({ x: -1, y: 1, blur: 1 }).bitmap.data).toEqual(
+      expectedImg.bitmap.data
+    );
+  });
+});