Update immediate and transitive dependencies

I don't think this has happened in awhile but I've run a `cargo update`
as well as trimming some of the duplicate/older dependencies in
`Cargo.lock` by updating some of our immediate dependencies as well.

cranelift/peepmatic/crates/test/Cargo.toml

@@ -8,7 +8,7 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-env_logger = "0.7.1"
+env_logger = "0.8.1"
 log = "0.4.8"
 peepmatic = { path = "../.." }
 peepmatic-runtime = { path = "../runtime" }