crate_universe now renders json formatted lockfiles (bazelbuild#692)

Notable changes in this PR:
- `crate_universe` `lockfile` attributes are now rendered as json files instead of starlark dumps
- The `cargo-raze` dependenciy has been updated to a pin which implements the required sorting and de-serialization.
- Formatted `use` declarations
- Updated dependencies
- `CARGO` and `RUSTC` environment variables are now ignored in determining the digest. This should be safe given that `cargo version` is an input to generating the lockfile hash.
- `repository_template` has been renamed to `crate_registry_template`, which is more correct.
- The [json](https://docs.bazel.build/versions/master/skylark/lib/json.html) module is now used to handle generating the config `.json` file

WORKSPACE.bazel

@@ -4,7 +4,7 @@ load("@rules_rust//rust:repositories.bzl", "rust_repositories")
 
 rust_repositories()
 
-load("@rules_rust//crate_universe:defs.bzl", "crate_universe_deps")
+load("@rules_rust//crate_universe:deps.bzl", "crate_universe_deps")
 
 crate_universe_deps()
 

crate_universe/Cargo.toml

@@ -16,7 +16,7 @@ edition = "2018"
 anyhow = "1"
 cargo_metadata = "0.13.1"
 # Until https://github.com/google/cargo-raze/pull/407 is merged:
-cargo-raze = { git = "https://github.com/UebelAndre/cargo-raze.git", rev = "caaf8345046eee830ea89fc04771ee117bd835eb", default-features = false }
+cargo-raze = { git = "https://github.com/UebelAndre/cargo-raze.git", rev = "0ef1bc28252b7458f214cd69ea6adff0c22ab019", default-features = false }
 cfg-expr = "0.7.4"
 env_logger = "0.8"
 hex = "0.4"
@@ -39,3 +39,4 @@ assert_cmd = "1"
 maplit = "1"
 predicates = "1"
 spectral = "0.6"
+tempfile = "3.2.0"