(feature): Whitelist http verbs
(feature): Whitelist http verbs

The 'method' method should only accept http verbs.
https://github.com/rspec/rspec-core/issues/2008 was such a tricky one to
debug, in part because this method accepts anything which can be coerced
into a symbol.

The list of verbs here is based on the methods available to
Net::HTTP in the Ruby standard library.

zeeraw/spryte