Remove Go version restrictions for newer versions

I'm (one of) the maintainer(s) of Dapr (dapr.io), a CNCF microservices project which today has a Kitex integration.

Kitex has been the **worst** third party dependency to deal with. Every time a new Go version is released the current Kitex version in use by us does not compile with that Go version, then I am forced to update the Kitex SDK (and dependencies) which brings breaking changes into our code I need to fix.

Please remove the Go version restriction, or I will be removing the Kitex integration from Dapr. No other dependency used by us in Dapr (and there are many!) has this problem.