Auto merge of #1895 - a1phyr:update_deps, r=RalfJung

Update dependencies

Author: bors

Cargo.lock

@@ -19,12 +19,12 @@ doctest = false # and no doc tests
 
 [dependencies]
 getrandom = { version = "0.2", features = ["std"] }
-env_logger = "0.8"
+env_logger = "0.9"
 log = "0.4"
 shell-escape = "0.1.4"
 hex = "0.4.0"
 rand = "0.8"
-smallvec = "1.4.2"
+smallvec = "1.7"
 
 # A noop dependency that changes in the Rust repository, it's a bit of a hack.
 # See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`
@@ -39,7 +39,7 @@ libc = "0.2"
 
 [dev-dependencies]
 compiletest_rs = { version = "0.7", features = ["tmp"] }
-rustc_version = "0.3"
+rustc_version = "0.4"
 colored = "2"
 
 [package.metadata.rust-analyzer]