fluid-let 1.0.0

Stabilizing the API! 🎉

New features:

• Convenience getters copied() and cloned() for copyable types.
• Convenience setter fluid_set! for scoped assignment.

Unstable features:

• "static-init" Cargo feature
  • fluid_let! allows 'static initializers:

    fluid_let!(static VARIABLE: Type = initial_value);