bump version in Makefile as well

Author: mr-c

Makefile

@@ -30,7 +30,7 @@ DEVPKGS=pycodestyle diff_cover pylint coverage pydocstyle flake8 \
 	pytest pytest-xdist isort
 DEBDEVPKGS=pep8 python-autopep8 pylint python-coverage pydocstyle sloccount \
 	   python-flake8 python-mock shellcheck
-VERSION=2.0.$(shell TZ=UTC git log --first-parent --max-count=1 \
+VERSION=2.1.$(shell TZ=UTC git log --first-parent --max-count=1 \
 	--format=format:%cd --date=format-local:%Y%m%d%H%M%S)
 mkfile_dir := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))