Use bulk processing from spacy pipeline

[gunthercox]

Spacy supports functionality to improve performance when processing large amounts of text. Example from their documentation:

texts = ["This is a text", "These are lots of texts", "..."]
- docs = [nlp(text) for text in texts]
+ docs = list(nlp.pipe(texts))

https://spacy.io/usage/processing-pipelines#processing

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It also looks like there are enable and disable options that can be used to include or exclude parts of the text processing pipeline. These might be a possible place to look for future performance improvements, but right now it isn't clear if adjusting these makes a significant impact.

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Closes #2350