Relax some min version requirements except for Tokio due to bugs

Cargo.toml

@@ -13,8 +13,8 @@ readme = "README.md"
 
 [dependencies]
 anyhow = "1.0"
-byteorder = "1.3.2"
-clap = { version="2.33.0", default-features = false, features=["wrap_help", "nightly"] }
+byteorder = "1.3"
+clap = { version="2.33", default-features = false, features=["wrap_help", "nightly"] }
 clockpro-cache = "0.1.8"
 coarsetime = "0.1.12"
 daemonize-simple = "0.1.2"
@@ -23,25 +23,25 @@ dnsstamps = "0.1.3"
 env_logger = { version = "0.7.1", default-features = false, features = ["humantime"] }
 futures = { version = "0.3", features = ["async-await"] }
 hyper = { version = "0.13", default_features = false, optional = true }
-ipext = "0.1.0"
-jemallocator = "0.3.2"
+ipext = "0.1"
+jemallocator = "0.3"
 libsodium-sys-stable="1.19"
 log = { version = "0.4.8", features = ["std", "release_max_level_debug"] }
 net2 = "0.2.33"
 parking_lot = "0.10"
 privdrop = "0.3.3"
-rand = "0.7.3"
+rand = "0.7"
 rustc-hash = "1"
 serde = "1.0"
 serde_derive = "1.0"
-serde-big-array = "0.2.0"
-siphasher = "0.3.1"
-tokio = { version = "0.2", features = ["fs", "rt-threaded", "time", "tcp", "udp", "stream"] }
-toml = "0.5.5"
+serde-big-array = "0.2"
+siphasher = "0.3"
+tokio = { version = "0.2.10", features = ["fs", "rt-threaded", "time", "tcp", "udp", "stream"] }
+toml = "0.5"
 
 [dependencies.prometheus]
 optional = true
-version = "0.7.0"
+version = "0.7"
 default_features = false
 features = ["process"]