Prepare for release v2.3.1

Author: epwalsh

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+
+## [v2.3.1](https://github.com/allenai/allennlp/releases/tag/v2.3.1) - 2021-04-20
+
 ### Added
 
 - Added support for the HuggingFace Hub as an alternative way to handle loading files. Hub downloads should be made through the `hf://` URL scheme.

allennlp/version.py

@@ -4,7 +4,7 @@
 _MINOR = "3"
 # On main and in a nightly release the patch should be one ahead of the last
 # released build.
-_PATCH = "0"
+_PATCH = "1"
 # This is mainly for nightly builds which have the suffix ".dev$DATE". See
 # https://semver.org/#is-v123-a-semantic-version for the semantics.
 _SUFFIX = os.environ.get("ALLENNLP_VERSION_SUFFIX", "")