[FIX] use fs.createReadStream instead of fs.readFileSync

__tests__/github.test.ts

@@ -19,7 +19,9 @@ describe("github", () => {
       assert.equal(name, "bar.txt");
       assert.equal(mime, "text/plain");
       assert.equal(size, 10);
-      assert.equal(data.toString(), "release me");
+      for await (const value of data) {
+        assert.equal(value, "release me");
+      }
     });
   });
 });

src/github.ts

@@ -1,7 +1,7 @@
 import fetch from "node-fetch";
 import { GitHub } from "@actions/github/lib/utils";
 import { Config, isTag, releaseBody } from "./util";
-import { statSync, readFileSync } from "fs";
+import { statSync, createReadStream } from "fs";
 import { getType } from "mime";
 import { basename } from "path";
 
@@ -11,7 +11,7 @@ export interface ReleaseAsset {
   name: string;
   mime: string;
   size: number;
-  data: Buffer;
+  data: NodeJS.ReadableStream;
 }
 
 export interface Release {
@@ -128,7 +128,7 @@ export const asset = (path: string): ReleaseAsset => {
     name: basename(path),
     mime: mimeOrDefault(path),
     size: statSync(path).size,
-    data: readFileSync(path),
+    data: createReadStream(path),
   };
 };