upgrade to go 1.19

Author: cktan

src/s3pool/Makefile

@@ -7,6 +7,8 @@ all:
 	echo '// THIS FILE IS GENERATED BY Makefile. DO NOT MODIFY. ' > conf/rev.go
 	echo "package conf" >> conf/rev.go
 	echo "var Revision = \"0.2x\"" >> conf/rev.go
+	-GOPATH=$(GOPATH) go mod init
+	-GOPATH=$(GOPATH) go mod tidy
 	GOPATH=$(GOPATH) go get .
 	GOPATH=$(GOPATH) go build .