Update pyramid to 1.9b1

[pyup-bot]

There's a new version of pyramid available.
You are currently using 1.9a2. I have updated it to 1.9b1

These links might come in handy: PyPI | Changelog | Homepage

Changelog

1.9b1

==================

• Add an informative error message when unknown predicates are supplied. The
  new message suggests alternatives based on the list of known predicates.
  See Fix #1603, add closest predicate name in error message Pylons/pyramid#3054

• Added integrity attributes for JavaScripts in cookiecutters, scaffolds, and
  resulting source files in tutorials.
  See use integrity attribute for javascripts from CDN Pylons/pyramid#2548

• Update RELEASING.txt for updating cookiecutters. Change cookiecutter URLs to
  use shortcut.
  See add pyramid_retry to cookiecutters Pylons/pyramid#3042

• Ensure the correct threadlocals are pushed during view execution when
  invoked from request.invoke_exception_view.
  See When invoking an exception view, push the new threadlocals Pylons/pyramid#3060

• Fix a bug in which pyramid.security.ALL_PERMISSIONS failed to return
  a valid iterator in its __iter__ implementation.
  See Ensure that instances of 'AllPermissionsList' are iterable. Pylons/pyramid#3074

• Normalize the permission results to a proper class hierarchy.
  pyramid.security.ACLAllowed is now a subclass of
  pyramid.security.Allowed and pyramid.security.ACLDenied is now a
  subclass of pyramid.security.Denied.
  See fix p.security.ACLPermitsResult to subclass p.security.PermitsResult Pylons/pyramid#3084

• Add a quote_via argument to pyramid.encode.urlencode to follow
  the stdlib's version and enable custom quoting functions.
  See quote_via urlencode argument Pylons/pyramid#3088

• Support _query=None and _anchor=None in request.route_url as well
  as query=None and anchor=None in request.resource_url.
  Previously this would cause an ? and a ``, respectively, in the url
  with nothing after it. Now the unnecessary parts are dropped from the
  generated URL. See refactor parse_url_overrides Pylons/pyramid#3034

• Revamp the IRouter API used by IExecutionPolicy to force
  pushing/popping the request threadlocals. The
  IRouter.make_request(environ) API has been replaced by
  IRouter.request_context(environ) which should be used as a context
  manager. See add a router.request_context context manager Pylons/pyramid#3086

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖