Added Type Hints for dilated shapelets #1910

[aryanpola]

What does this implement/fix? Explain your changes.
I have added type hints for function variables and return values as described in issue #1910

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[aryanpola]

Could you please let me know the reasons for the failure of the tests? @aiwalter

[Datadote]

I recommend checking where the pytests failed. For example, I browsed some of the pytests and saw an error in the "compute_shapelete_dist_vector" method. "distanceCPUDispatcher" probably is an error?

def compute_shapelet_dist_vector(
X_subs: np.ndarray, values: np.ndarray, length: int, distanceCPUDispatcher
):

[baraline]

Sorry I should have been tagged for this file, seems i'm not on maintainer list for this one. @aryanpola If you need any further help with the PR instead of closing it don't hesitate to ask me !