added githooks

.githooks/pre-commit

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# File generated by pre-commit: https://pre-commit.com
+# ID: 138fd403232d2ddd5efb44317e38bf03
+
+# start templated
+INSTALL_PYTHON=/usr/bin/python3
+ARGS=(hook-impl --config=.pre-commit-config.yaml --hook-type=pre-commit)
+# end templated
+
+HERE="$(cd "$(dirname "$0")" && pwd)"
+ARGS+=(--hook-dir "$HERE" -- "$@")
+
+if [ -x "$INSTALL_PYTHON" ]; then
+    exec "$INSTALL_PYTHON" -mpre_commit "${ARGS[@]}"
+elif command -v pre-commit > /dev/null; then
+    exec pre-commit "${ARGS[@]}"
+else
+    echo '`pre-commit` not found.  Did you forget to activate your virtualenv?' 1>&2
+    exit 1
+fi