Change go get to go install

Author: stephenmcconkey

Makefile

@@ -95,7 +95,7 @@ $(GOPATH)/bin/gosec:
 
 $(GOPATH)/bin/oapi-codegen:
 	@echo "🔘 Installing oapicodegen ... (`date '+%H:%M:%S'`)"
-	@go get github.com/deepmap/oapi-codegen/cmd/[email protected]
+	@go install github.com/deepmap/oapi-codegen/cmd/[email protected]
 
 PHONY+= tools
 tools: $(GOPATH)/bin/golangci-lint $(GOPATH)/bin/golint $(GOPATH)/bin/gosec $(GOPATH)/bin/goimports $(GOPATH)/bin/oapi-codegen