Upgrade dependencies with: go get -u ./... go mod tidy
Add go 1.14 to CI testing. Upgrade golang.org/x/tools dependency to resolve golang/go#37617.
Updates modules handling so build passes in Go 1.13. Bypasses modules for tools install in bootstrap. Upgrades golangci-lint version to avoid bug with v1.17.1 under Go 1.13. Fixes #95
Updates #21