feat(DataResolver): prefer streams over buffers (#4075)

* feat(DataResolver): prefer streams over buffers

* feat(DataResolver): add `resolveFileAsBuffer`

Add `resolveFileAsBuffer` to use it in `resolveImage` which still requires Buffers to work.

* fix(DataResolver): make sure `resolveFile` always returns a Promise

* refactor(DataResolver): use for-await-of

* fix(DataResolver): use forked form-data which supports custom streams

* fix(APIRequest): use forked form-data in code too

Co-authored-by: - <5144598+-@users.noreply.github.com>
Co-authored-by: SpaceEEC <spaceeec@yahoo.com>

package.json

@@ -48,8 +48,8 @@
   "unpkg": "./webpack/discord.min.js",
   "dependencies": {
     "@discordjs/collection": "^0.1.5",
+    "@discordjs/form-data": "^3.0.1",
     "abort-controller": "^3.0.0",
-    "form-data": "^3.0.0",
     "node-fetch": "^2.6.0",
     "prism-media": "^1.2.0",
     "setimmediate": "^1.0.5",