Add support for Catch-all path variables

[nrako]

functions:
  foo:
    handler: handler.foo
    events:
      - http:
          path: foo/{bar+}
          method: get

Catch-all Path Variables – Instead of specifying individual paths and behaviors for groups of requests that fall within a common path (such as /store/), you can now specify a catch-all route that intercepts all requests to the path and routes them to the same function. For example a single greedy path (/store/{proxy+}) will intercept requests made to /store/list-products, /store/add-product, and /store/delete-product.

source: https://aws.amazon.com/blogs/aws/api-gateway-update-new-features-simplify-api-development/

PR #82 has some work around this but, from my test, it's implementation doesn't match what AWS has. e.g the name variable doesn't need to be called {proxy+}. And the named path variable must be available in event.pathParameters.

[HyperBrain]

serve will be removed in the next v3.0.0 release in favor of serverless-offline (see #152 ). No efforts will be spent on the function anymore. So I'll close this issue.