remove nodejs 12 suppport, fix tests

Author: gfx

.github/workflows/ci.yml

@@ -13,7 +13,6 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - '12'
           - '14'
           - '16'
           - '18'

package.json

@@ -61,7 +61,6 @@
     "@typescript-eslint/eslint-plugin": "latest",
     "@typescript-eslint/parser": "latest",
     "assert": "latest",
-    "blob-polyfill": "latest",
     "buffer": "latest",
     "core-js": "latest",
     "eslint": "latest",

test/decode-blob.test.ts

@@ -1,12 +1,9 @@
 import assert from "assert";
-import "web-streams-polyfill";
 import { encode, decode, decodeAsync } from "@msgpack/msgpack";
 
-const MyBlob: typeof Blob = typeof Blob !== "undefined" ? Blob : require("blob-polyfill").Blob;
-
 describe("Blob", () => {
   it("decodes it with `decode()`", async function () {
-    const blob = new MyBlob([encode("Hello!")]);
+    const blob = new Blob([encode("Hello!")]);
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!blob.arrayBuffer) {
       this.skip();
@@ -15,7 +12,7 @@ describe("Blob", () => {
   });
 
   it("decodes it with `decodeAsync()`", async function () {
-    const blob = new MyBlob([encode("Hello!")]);
+    const blob = new Blob([encode("Hello!")]);
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!blob.stream) {
       this.skip();