ReactServerAgent.del doesn't accept post args

[roblg]

Expected: the following should work

ReactServerAgent.del('/foo', {foo: "bar"}).then(() => { ... })

Actual: it doesn't.

I believe this works though:

ReactServerAgent.del('/foo').send({foo: "bar"}).then(() => { ... });

Looks like ReactServerAgent.del doesn't follow the same pattern as its siblings in allowing the shorthand. Seems like it should.

[cashhh]

I'd like to give this a shot

[drewpc]

Fixed in #882