Initial 3.0 Features

[commonsensesoftware]

This PR started as an experiment to add keyed services, but has now introduced a number of core features that will now form the basis of 3.0

Features

• Support keyed services
• Support mutable services
• Relax 'static lifetime requirement in generic type arguments (for dyn Any)
• Refactor factory functions from Fn to fn which removes the explicit 'static lifetime on closures (that should be stateless anyway)
• ServiceDescriptorBuilder has moved to the builder feature
• Support scoped ServiceProvider by convention using declared type ScopedServiceProvider
• Improved proc macro attribute support for Injectable:
  • Support bare struct definition
  • Support tuple struct
  • Support impl Iterator<Item> (as opposed to just Vec) in injected constructors
• Injectable::inject now returns InjectBuilder which also allows:
  • Adding a key via with_key<TKey>()
  • Adding mutability with as_mut()
• Add support Debug to ServiceCollection
  • When the fmt feature is activated, then Display with colorized terminal output is also supported
• Add user guide with GitHub Pages

[github-actions[bot]]

Test Results

    2 files  ±  0      6 suites  ±0   0s :stopwatch: ±0s   95 tests +27    95 :heavy_check_mark: +27  0 :zzz: ±0  0 :x: ±0  189 runs  +54  189 :heavy_check_mark: +54  0 :zzz: ±0  0 :x: ±0 

Results for commit 487414f6. ± Comparison against base commit 30b74e8c.