Update the cargo dependencies

[Lyamc]

Just tried to install on Windows 10

cargo install vnc-client
    Updating crates.io index
  Downloaded vnc-client v1.0.0
  Downloaded 1 crate (6.5 KB) in 0.51s
  Installing vnc-client v1.0.0
error: failed to compile `vnc-client v1.0.0`, intermediate artifacts can be found at `C:\Users\Lyam\AppData\Local\Temp\cargo-installNAcCil`

Caused by:
  failed to select a version for the requirement `clap = "^1.5"`
  candidate versions found which didn't match: 2.33.3, 2.33.2, 2.33.1, ...
  location searched: crates.io index
  required by package `vnc-client v1.0.0`

I went ahead and tried to compile with newer versions but I think my mingw-w64 install is borked