bump backend go deps

backend/vendor/github.com/oapi-codegen/nullable/Makefile

@@ -0,0 +1,28 @@
+GOBASE=$(shell pwd)
+GOBIN=$(GOBASE)/bin
+
+help:
+	@echo "This is a helper makefile for oapi-codegen"
+	@echo "Targets:"
+	@echo "    test:        run all tests"
+	@echo "    tidy         tidy go mod"
+	@echo "    lint         run linting"
+
+$(GOBIN)/golangci-lint:
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) v1.55.2
+
+.PHONY: tools
+tools: $(GOBIN)/golangci-lint
+
+lint: tools
+	git ls-files go.mod '**/*go.mod' -z | xargs -0 -I{} bash -xc 'cd $$(dirname {}) && $(GOBIN)/golangci-lint run ./...'
+
+lint-ci: tools
+	git ls-files go.mod '**/*go.mod' -z | xargs -0 -I{} bash -xc 'cd $$(dirname {}) && $(GOBIN)/golangci-lint run ./... --out-format=github-actions --timeout=5m'
+
+test:
+	git ls-files go.mod '**/*go.mod' -z | xargs -0 -I{} bash -xc 'cd $$(dirname {}) && go test -cover ./...'
+
+tidy:
+	@echo "tidy..."
+	git ls-files go.mod '**/*go.mod' -z | xargs -0 -I{} bash -xc 'cd $$(dirname {}) && go mod tidy'