update Makefile

Author: worlpaker

Makefile

@@ -1,8 +1,20 @@
 test:
 	go test -v ./...
+race:
+	go test -race ./...
 cover:
 	go test -coverprofile="cover.out" ./...
 	go tool cover -html="cover.out"
 covtotal:
 	go test ./... -coverprofile cover.out
-	go tool cover -func cover.out
+	go tool cover -func cover.out
+covatomic:
+	go test -race -coverprofile="cover.out" -covermode=atomic ./...
+	go tool cover -html="cover.out"
+deps:
+	go get -u all
+	go mod tidy
+# Ensure https://github.com/icholy/gomajor is installed.
+major:
+	gomajor get all
+	go mod tidy