6.0.0: XP 12 compatibility, PHP 7.4+

• Dropped support for XP <= 9, see xp-framework/rfc#341 - @thekid
• Made compatible with XP 12, dropping PHP 7.0 - 7.3 - @thekid
• Added PHP 8.4 to the test matrix - @thekid
• Merged PR #30: Migrate to new reflection API - @thekid

5.5.0: Eager singletons

• Merged PR #31: Make it possible to pass instances to singleton()
  (@thekid)
• Merged PR #29: Migrate to new testing library - @thekid

5.4.0: Simplified primitives

• Prefer float over double for floating point numbers. Consistent
  with PHP's type system, see xp-framework/core#213
  (@thekid)
• Merged PR #28: Fix type errors with primitive bindings - @thekid
• Merged PR #27: Simplify string bindings (in ConfiguredBindings). Now,
  string bindings can be intuitively written as key=value.
  (@thekid)

5.3.0: Exception consistency

• Merged PR #26: Wrap instance creation errors in instanceOf() - @thekid

5.2.0: Type union injection

• Merged PR #25: Try injecting all members in a type union, don't stop
  at the first error. This is the correct fix for #24
  (@thekid)

5.1.2: Injection lookup loop fix

• Quickfixed #24: Endless loop when injecting webservices.rest.Endpoint
  by raising an exception. This is not perfect yet but definitively an
  improvement over a crashing program!
  (@thekid)

5.1.1: XP 11, PHP 8.1 compatibility

• Made library compatible with XP 11 - @thekid
• Made compatible with PHP 8.1 - add ReturnTypeWillChange attributes to
  array access, see https://wiki.php.net/rfc/internal_method_return_types

5.1.0: Named binding precedence

• Changed implementation to check named bindings before resorting to
  parameters' default values
  (@thekid)

5.0.2: Nullable fix

• Fixed compatibility with XP 10.6.0's nullable types - @thekid

5.0.1: PHP8 compatibility fix

• Fixed ParseError (syntax error, unexpected token "@") in PHP 8.0
  (@thekid)