Prepare for release v2.6.0

Author: dirkgr

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+Nothing so far!
+
+
+## [v2.6.0](https://github.com/allenai/allennlp/releases/tag/v2.6.0) - 2021-07-19
+
 ### Added
 
 - Added `on_backward` training callback which allows for control over backpropagation and gradient manipulation.

allennlp/version.py

@@ -1,10 +1,10 @@
 import os
 
 _MAJOR = "2"
-_MINOR = "5"
+_MINOR = "6"
 # On main and in a nightly release the patch should be one ahead of the last
 # released build.
-_PATCH = "1"
+_PATCH = "0"
 # 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", "")