schema: make with golang 1.16

Signed-off-by: Iceber Gu <wei.cai-nat@daocloud.io>

schema/Makefile

@@ -15,8 +15,8 @@ fmt:
 
 .PHONY: validate
 validate: validate.go
-	go get -d ./...
-	go build ./validate.go
+	GO111MODULE=auto go get github.com/xeipuuv/gojsonschema
+	GO111MODULE=auto go build ./validate.go
 
 test: validate $(TESTS)
 	for TYPE in $$(ls test); \

schema/README.md

@@ -23,10 +23,8 @@ There is also included a simple utility for facilitating validation.
 To build it:
 
 ```bash
-export GOPATH=`mktemp -d`
-go get -d ./...
+go get github.com/xeipuuv/gojsonschema
 go build ./validate.go
-rm -rf $GOPATH
 ```
 
 Or you can just use make command to create the utility: