Update pre-push-tests.sh

scripts/dev/pre-push-tests.sh

-SCRIPTDIR=$(dirname $0)
+#!/bin/sh
 
+# exit when any command fails
+set -e
+
+GREEN='\033[0;32m'
+
+
+./scripts/dev/pylint-ci.sh gajim
+echo "${GREEN}pylint: \t OK"
 mypy gajim
-${SCRIPTDIR}/pylint-ci.sh --jobs=0 gajim
+echo "${GREEN}mypy: \t\t OK"
+codespell -I codespell.conf --skip="*__pycache__*,gajim/data/icons,gajim/data/sounds,gajim/data/emoticons" gajim
+echo "${GREEN}codespell: \t OK"
+echo "${GREEN}ready to push"