cargo-metadata's resolve doesn't identify the kind of the dependency

[sfackler]

There's no way (as far as I can tell) to see if the runtime bitflags dependency of this setup is turned on or not via cargo-metadata.

[package]                                                                                                                                                                                                                                                                          
name = "foo"                                                                                                                                                                                                                                                                       
version = "0.1.0"                                                                                                                                                                                                                                                                  
authors = ["Steven Fackler <sfackler@gmail.com>"]                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                   
[dependencies]                                                                                                                                                                                                                                                                     
bitflags = { version = "0.1", optional = true }                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                   
[build-dependencies]                                                                                                                                                                                                                                                               
bitflags = "0.1"

[stale]

As there hasn't been any activity here in over 6 months I've marked this as stale and if no further activity happens for 7 days I will close it.

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[sfackler]

Still needed for cargo-tree to move off of cargo-the-library.