Add vendor to improve building speed.

This also adds ability to be built in network-constrained environment.

vendor/github.com/go-playground/validator/v10/Makefile

@@ -0,0 +1,18 @@
+GOCMD=go
+
+linters-install:
+	@golangci-lint --version >/dev/null 2>&1 || { \
+		echo "installing linting tools..."; \
+		curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s v1.41.1; \
+	}
+
+lint: linters-install
+	golangci-lint run
+
+test:
+	$(GOCMD) test -cover -race ./...
+
+bench:
+	$(GOCMD) test -run=NONE -bench=. -benchmem ./...
+
+.PHONY: test lint linters-install