v3.0.1

Adding an improvement that was originally intended for 3.0.0.

Added

• Support additional Cache-Control directives in response.cache_control: :immutable, :must_understand, stale_while_revalidate: (requires a duration) and stale_if_error: (requires a duration). (@timriley in #522)

Changed

• response.cache_control raises ArgumentError for unknown directives instead of silently dropping them. (@timriley in #522)

Compare v3.0.0 ... v3.0.1