Should not ignore error from publish respond

[andylokandy]

Assume that we already have lightyear|0.2.4 on index and we try to publish it again by cli, ideally we will get 400 bad request status code and a error msg like this :

{error:"no_permission",description:"Package `lightyear/lightyear 0.2.4` already exists"}

But now elba shows success in terminal:

elba publish
       [1/2] Resolving dependencies...

       [2/2] Building targets...
    Building lightyear/lightyear 0.2.4 (dir+C:\Users\Andy\Desktop\tests\lightyear) [ef9499ab..]


  Publishing package lightyear/lightyear|0.2.4

done! published package to index index+git+https://github.com/andylokandy/index.git#master [3.88s]

[andylokandy]

All possible error tags are here:

#[derive(Debug)]
pub enum Reason {
    InvalidFormat,
    InvalidManifest,
    NoPermission,
    UserNotFound,
    TokenNotFound,
    PackageNotFound,
    DependencyNotFound,
}

impl Reason {
    pub fn tag(&self) -> &'static str {
        match self {
            Reason::InvalidFormat => "invalid_format",
            Reason::InvalidManifest => "invalid_manifest",
            Reason::NoPermission => "no_permission",
            Reason::UserNotFound => "user_not_found",
            Reason::TokenNotFound => "token_not_found",
            Reason::PackageNotFound => "package_not_found",
            Reason::DependencyNotFound => "dependency_not_found",
        }
    }
}

Bu now we can just show the body of respond directly.