Route refreshing TTL

[Udumft]

Added route response refresh TTL field and a DirectionsError to signal refreshing has expired

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.32%. Comparing base (c277fff) to head (2701cc4).

@@            Coverage Diff             @@
##             main     #827      +/-   ##
==========================================
+ Coverage   84.24%   84.32%   +0.08%     
==========================================
  Files          59       59              
  Lines        4906     4926      +20     
==========================================
+ Hits         4133     4154      +21     
+ Misses        773      772       -1     

Files	Coverage Δ
Sources/MapboxDirections/Directions.swift	74.35% <100.00%> (+0.26%)	:arrow_up:
Sources/MapboxDirections/DirectionsError.swift	87.40% <100.00%> (+1.69%)	:arrow_up:
Sources/MapboxDirections/RouteResponse.swift	87.03% <100.00%> (+0.43%)	:arrow_up:

[Udumft]

List of accepted breaking changes:

• 💔 API breakage: enumelement DirectionsError.refreshExpired has been added as a new enum case
• PR adds handling of a new type of an error, I don't see a way how to avoid adding a new enum case, other than abusing .unknown.
• 💔 API breakage: constructor DirectionsError.init(code:message:response:underlyingError:) has been removed
• New argument added to this constructor with a default value -> won't require code changes on client's side
• 💔 API breakage: constructor RouteResponse.init(httpResponse:identifier:routes:waypoints:options:credentials:) has been removed
• New argument added to this constructor with a default value -> won't require code changes on client's side