fix: workflows runs only in go version 1.18

examples/demo-with-go-plugin/plugin/debugtalk_gen.go

@@ -1,16 +0,0 @@
-// NOTE: Generated By hrp v4.1.5, DO NOT EDIT!
-package main
-
-import (
-	"github.com/httprunner/funplugin/fungo"
-)
-
-func main() {
-	fungo.Register("SumTwoInt", SumTwoInt)
-	fungo.Register("SumInts", SumInts)
-	fungo.Register("Sum", Sum)
-	fungo.Register("SetupHookExample", SetupHookExample)
-	fungo.Register("TeardownHookExample", TeardownHookExample)
-	fungo.Register("GetUserAgent", GetUserAgent)
-	fungo.Serve()
-}