Update Makefile with integration test & cover

Makefile

@@ -2,9 +2,10 @@ help:
 	@echo "You can perform the following:"
 	@echo ""
 	@echo "  check         Format, vet, and unit test Go code"
-	@echo "  cover         Show test coverage in html"
-	@echo "  lint          Lint Go code using staticcheck"
+	@echo "  cover         Run & show test coverage in html"
 	@echo "  int           Run integration tests"
+	@echo "  int-cover     Run & show integration test coverage in html"
+	@echo "  lint          Lint Go code using staticcheck"
 
 check:
 	@echo 'Formatting, vetting, and testing Go code'
@@ -17,10 +18,15 @@ lint:
 	staticcheck -f stylish ./...
 
 cover:
-	@echo 'Test coverage in html'
-	go test -coverprofile=coverage.out
+	@echo 'Unit test coverage in html'
+	go test ./... -coverprofile=coverage.out
 	go tool cover -html=coverage.out
 
 int:
 	@echo 'Run integration tests'
 	go test ./... -tags=integration
+
+int-cover:
+	@echo 'Integration test coverage in html'
+	go test -coverprofile=coverage.out -tags=integration
+	go tool cover -html=coverage.out