End-to-end unit test (#90)

* First implementation of create_torrent_file

* Test harness for e2e preparing

* Saving

* Continuing test harness

* Continuing test harness

* Continuing test harness

* All servers are running

* Full e2e harness done

* Test e2e harness working fine

* Remove lints

* injecting faults

* The e2e test runs continuously

* e2e test

* Add a test for create_torrent

* Nothing

* Nothing, just tweaking the numberes

* Update tokio, remove custom tempfile shim

Cargo.lock

@@ -1292,6 +1292,7 @@ dependencies = [
  "serde_with",
  "sha1",
  "size_format",
+ "tempfile",
  "tokio",
  "tokio-stream",
  "tokio-test",
@@ -2483,9 +2484,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.35.1"
+version = "1.36.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c89b4efa943be685f629b149f53829423f8f5531ea21249408e8e2f8671ec104"
+checksum = "61285f6515fa018fb2d1e46eb21223fff441ee8db5d0f1435e8ab4f5cdb80931"
 dependencies = [
  "backtrace",
  "bytes",