Upgrade packer

Summary:
This had collected a bit of dust and we will need to extend this a little for flipper-server.

- Update deps.
- Migrate away from deprecated clap2 model to derive (it's much shorter now and less imperative).
- ~~Some COW changes on how the progress bar crate handles strings.~~ (Reverted as this causes havvoc in `fbsource//third-party/rust`.)
- Upgraded to 2021 Edition.

Reviewed By: nikoant

Differential Revision: D35433571

fbshipit-source-id: ae0a91558610ae46069a5fc5162b524cde759454

packer/Cargo.toml

@@ -5,12 +5,12 @@ license = "MIT"
 repository = "https://github.com/facebook/flipper.git"
 keywords = ["flipper", "cli"]
 categories = ["development-tools"]
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Facebook, Inc."]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
-clap = "2.34.0"
+clap = { version = "3.1.7", features = ["derive", "cargo"] }
 shellexpand = "2.1.0"
 tar = "0.4.38"
 serde = { version = "1.0.136", features = ["derive"] }
@@ -18,7 +18,7 @@ serde_yaml = "0.8.23"
 anyhow = "1.0.56"
 sha2 = "0.10.2"
 data-encoding = "2.3.2"
-serde_json = "1.0.67"
+serde_json = "1.0.79"
 rayon = "1.5.1"
 indicatif = "^0.15"
 xz2 = "0.1.6"