fix: big file uploads (#562)

* fix: use readableWebStream() to stream asset contents

This allows the uploads to finish without mismatched Content-Length,
likely because the original method implied a wrong body encoding or
something similar. Unfortunately a GitHub server API mock was not
readily available so I had to test manually with a barebones repository.

Fixes: #555
Fixes: #556
Signed-off-by: WANG Xuerui <git@xen0n.name>

* feat: log when each asset is successfully uploaded

Signed-off-by: WANG Xuerui <git@xen0n.name>

* build: refresh dist

Signed-off-by: WANG Xuerui <git@xen0n.name>

* style: format with prettier

Signed-off-by: WANG Xuerui <git@xen0n.name>

---------

Signed-off-by: WANG Xuerui <git@xen0n.name>

__tests__/github.test.ts

@@ -14,11 +14,10 @@ describe("github", () => {
 
   describe("asset", () => {
     it("derives asset info from a path", async () => {
-      const { name, mime, size, data } = asset("tests/data/foo/bar.txt");
+      const { name, mime, size } = asset("tests/data/foo/bar.txt");
       assert.equal(name, "bar.txt");
       assert.equal(mime, "text/plain");
       assert.equal(size, 10);
-      assert.equal(await text(data), "release me");
     });
   });
 });