update to proxmox-sys 0.2 crate

- imported pbs-api-types/src/common_regex.rs from old proxmox crate
- use hex crate to generate/parse hex digest
- remove all reference to proxmox crate (use proxmox-sys and
  proxmox-serde instead)

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

pbs-api-types/Cargo.toml

@@ -15,8 +15,10 @@ openssl = "0.10"
 regex = "1.2"
 serde = { version = "1.0", features = ["derive"] }
 
-proxmox = "0.15.3"
 proxmox-lang = "1.0.0"
 proxmox-schema = { version = "1.0.1", features = [ "api-macro" ] }
+proxmox-serde = "0.1"
 proxmox-time = "1.1"
 proxmox-uuid = { version = "1.0.0", features = [ "serde" ] }
+
+proxmox-sys = "0.2" # only needed foör nodename()??