v0.14.0

A module dependency report, derived from what registrations already carry.
go doc -all against 0.13.1 adds Scope.Modules and changes no signature;
an upgrade cannot break a caller.

Added

• Scope.Modules() renders the modules registered into a scope and its
  ancestors: what each provides, what it needs and which module serves it,
  what it wraps, and which of its constructors are closures whose needs are
  known only when they run. A need only a resolving scope can provide is
  reported as owed, as Validate reports it, and a module's dependency on its
  own services is left out. It is derived from what registrations already
  carry, the module label and the parameters Wire declares, so there is
  nothing to declare twice. Keys are named by their package rather than their
  import path, to read beside the module labels.