v0.5.3

Added

• Vec<T>::contains_exactly_in_any_order for direct parity with slice assertions.
• Array assertions for contains and contains_exactly_matching_in_any_order.

Changed

• Aligned [T; N], &[T], and Vec<T> collection assertion coverage in the README.
• Broadened array contains_exactly to support comparable expected element types via AssertrPartialEq, matching
  slice and Vec behavior.
• Expanded Vec<T> and [T; N] collection assertion tests.