feat(hooks): add missing filter hook

When running git flow release finish the version can be modified prior
to merging the release branch. This script was missing.

Author: ChrisJStone

hooks/filter-flow-release-finish-version

@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+# Runs during git flow release finish
+#
+# Positional arguments:
+# $1    Version
+#
+# Return VERSION - When VERSION is returned empty, git-flow will stop as the
+# version is necessary
+#
+# The following variables are available as they are exported by git-flow:
+#
+# MASTER_BRANCH - The branch defined as Master
+# DEVELOP_BRANCH - The branch defined as Develop
+#
+VERSION=$1
+
+# Implement your script here.
+
+# Return the VERSION
+echo ${VERSION}
+exit 0