Update pip as part of setting virtual environment.

Makefile

@@ -52,7 +52,7 @@ install:

setup-venv: ## setup a development virutalenv in current directory
	if [ ! -d $(VENV) ]; then virtualenv $(VENV); exit; fi;
	$(IN_VENV) pip install -r requirements.txt && pip install -r dev-requirements.txt
	$(IN_VENV) pip install --upgrade pip && pip install -r requirements.txt && pip install -r dev-requirements.txt

setup-git-hook-lint: ## setup precommit hook for linting project
	cp $(BUILD_SCRIPTS_DIR)/pre-commit-lint .git/hooks/pre-commit