Fixed failing build for Windows

Turns out syscall.stdin changes type from int to syscall.Handle when compiled with GOOS=windows

Hiding password input and support for Go 1.15, courtesy of @vjagaro

Merge pull request #3 from vjagaro/suppress-password-output

Suppress password output

Initial release

v1.0.0

once more I get foiled by go.sum getting hidden inside Goland's file …