Update to Go 1.13.14
go1.13.14 (released 2020/07/16) includes fixes to the compiler, vet, and the
database/sql, net/http, and reflect packages. See the Go 1.13.14 milestone on
the issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.13.14+label%3ACherryPickApproved