Merge pull request #62 from silvio/sfr/to-6.4

update to 6.4

Makefile.version

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: LGPL-3.0-or-later
-VERSION := 6.3a
+VERSION := 6.4
 UNPACKED_VERSION := $(shell echo $(VERSION) | sed -e 's/\([0-9]\+\.[0-9]\+\)\(.*\)/\1/')
 BUILDARG_VERSION := --build-arg VERSION=$(VERSION) --build-arg UNPACKED_VERSION=$(UNPACKED_VERSION)
 IMAGENAME := docker.io/silviof/docker-languagetool