UX: Better error handling if `replaces:` block needed, and hide help on error

gobump improperly bumped a version

detect the right location of go.mod where to bump the dep

Replaces fails - if the upstream project has defined the dependency in both a 'replace' and a 'require' block

Should the 'deps' field be required?

When updating an existing dependency: move it to the end of the list instead of updating its value

Handle multiple go build blocks

run go mod vendor when detected a vendor folder

auto detect go version is causing some failures

go/bump package downloading order causing failure