Unable to construct URI if scheme is ssh

[vdayanand]

julia> URIs.URI(scheme = "ssh",  host="test.com", userinfo="testuser" )
ERROR: ArgumentError: backtrace() requires scheme in uses_authority || isempty(host)
Stacktrace:
 [1] macro expansion
   @ ~/.julia/packages/URIs/o9DQG/src/debug.jl:52 [inlined]
 [2] URI(uri::URI; scheme::String, userinfo::SubString{String}, host::String, port::SubString{String}, path::SubString{String}, query::SubString{String}, fragment::SubString{String})
   @ URIs ~/.julia/packages/URIs/o9DQG/src/URIs.jl:70
 [3] #URI#4
   @ ~/.julia/packages/URIs/o9DQG/src/URIs.jl:83 [inlined]
 [4] top-level scope
   @ REPL[17]:1

I see ssh is not present in

URIs.jl/src/URIs.jl

Line 282 in 5a1a0a1

const uses_authority = ["https", "http", "ws", "wss", "hdfs", "ftp", "gopher", "nntp", "telnet", "imap", "wais", "file", "mms", "shttp", "snews", "prospero", "rtsp", "rtspu", "rsync", "svn", "svn+ssh", "sftp" ,"nfs", "git", "git+ssh", "ldap", "s3"]

Any reason to exclude ssh?

[quinnj]

No reason to exclude; mind making a PR to add?

[fonsp]

More generally #34