update some deps, remove unused ones

Cargo.toml

@@ -6,15 +6,12 @@ edition = "2018"
 
 [dependencies]
 libpso = { git = "http://git.sharnoth.com/jake/libpso" }
-async-std = { version = "1.5.0", features = ["unstable", "attributes"] }
+async-std = { version = "1.7.0", features = ["unstable", "attributes"] }
 futures = "0.3.5"
 rand = "0.7.3"
 rand_chacha = "0.2.2"
-mio = "0.6"
-mio-extras = "2.0.5"
 crc = "^1.0.0"
 bcrypt = "0.4"
-threadpool = "1.0"
 chrono = "0.4.11"
 serde = "*"
 serde_json = "*"
@@ -27,7 +24,7 @@ enum-utils = "0.1.2"
 derive_more = { version = "0.99.3", features = ["display"]}
 thiserror = "1.0.15"
 ages-prs = "0.1"
-async-trait = "0.1.31"
+async-trait = "0.1.41"
 lazy_static = "1.4.0"
 barrel = { version = "0.6.5", features = ["pg"] }
 refinery = { version = "0.3.0", features = ["postgres"] }