Bump version to stack-2.1.4

ChangeLog.md

 # Changelog
 
 
+## Unreleased changes
+
+**Changes since v2.1.3**
+
+Release notes:
+
+Major changes:
+
+Behavior changes:
+
+Other enhancements:
+
+Bug fixes:
+
+
 ## v2.1.3
 
 **Changes since v2.1.1**

package.yaml

 name: stack
-version: '2.1.3'
+version: '2.1.4'
 synopsis: The Haskell Tool Stack
 description: |
   Please see the documentation at <https://docs.haskellstack.org>

subs/pantry/ChangeLog.md

 # Changelog for pantry
 
 
+## Unreleased changes
+
+**Changes since v0.1.1.0**
+
+Release notes:
+
+Major changes:
+
+Behavior changes:
+
+Other enhancements:
+
+Bug fixes:
+
+
 ## v0.1.1.0
 
 **Changes since 0.1.0.0**