Use :pr: role for recent releases

CHANGELOG.rst

@@ -8,7 +8,7 @@ Features:
 
 - [apispec.core]: *Backwards-incompatible*: Remove `Path` class.
   Plugins' `path_helper` methods should now return a path as a string
-  and optionally mutate the `operations` dictionary (:issue:`238`).
+  and optionally mutate the `operations` dictionary (:pr:`238`).
 
 0.39.0 (2018-06-28)
 +++++++++++++++++++
@@ -35,18 +35,18 @@ Features:
 - [apispec.core]: *Backwards-incompatible*: Rename ``apispec.utils.validate_swagger``
   to ``apispec.utils.validate_spec`` and
   ``apispec.exceptions.SwaggerError`` to ``apispec.exceptions.OpenAPIError``.
-  Using ``validate_swagger`` will raise a ``DeprecationWarning`` (:issue:`224`).
+  Using ``validate_swagger`` will raise a ``DeprecationWarning`` (:pr:`224`).
 - [apispec.core]: ``apispec.utils.validate_spec`` no longer relies on
   the ``check_api`` NPM module. ``prance`` and
   ``openapi-spec-validator`` are required for validation, and can be
-  installed using ``pip install 'apispec[validation]'`` (:issue:`224`).
+  installed using ``pip install 'apispec[validation]'`` (:pr:`224`).
 - [apispec.core]: Deep update components instead of overwriting components
-  for OpenAPI 3 (:issue:`222`). Thanks :user:`Guoli-Lyu`.
+  for OpenAPI 3 (:pr:`222`). Thanks :user:`Guoli-Lyu`.
 
 Bug fixes:
 
 - [apispec.ext.marshmallow]: Fix description for parameters in OpenAPI 3
-  (:issue:`223`). Thanks again :user:`Guoli-Lyu`.
+  (:pr:`223`). Thanks again :user:`Guoli-Lyu`.
 
 Other changes: