build: version -> 21.1.13, changelog updated

Author: desht

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [21.1.13]
+
+### Fixed
+* Reworked hammer & crook recipe handling somewhat
+  * Hopefully fixes related occasional ConcurrentModificationException errors
+  
 ## [21.1.12]
 
 ### Added

gradle.properties

@@ -18,7 +18,7 @@ mod_id=ftbstuff
 # The human-readable display name for the mod.
 mod_name=FTB Stuff & Things
 mod_license=All Rights Reserved
-mod_version=21.1.12
+mod_version=21.1.13
 archives_base_name=ftb-stuff-things
 
 mod_group_id=dev.ftb.mods