phaseEnded/stepEnded don't occur when navigation is skipped and fadeStepWhenSkipped is disabled

[IanLunn]

Dependencies: navigationSkip: true, fadeStepWhenSkipped: false, preventReverseSkipping: false

Problem: With the above dependencies, when the user navigates between steps quickly, the phaseEnded() and stepEnded() do not occur until navigation skipping has stopped. This may cause issues for themes that change the states/styles of steps based on these public events. For example, when a step ends, it's background colour is changed. Without these events, the background won't be able to change when navigation skipping occurs.