With go 1.17 out and the performance improvements seem very impressive we should consider bumping the version:

Go 1.17 implements a new way of passing function arguments and results using registers instead of the stack. Benchmarks for a representative set of Go packages and programs show performance improvements of about 5%, and a typical reduction in binary size of about 2%.

There were some changes to go mod and to unsafe package but judging by a quick search in the codebase it shouldn't affect us. Full release docs https://golang.org/doc/go1.17