Update dependency johnpbloch/wordpress to v5.9.0

This MR contains the following updates:

Package	Type	Update	Change
johnpbloch/wordpress (source)	require	minor	5.8.1 -> 5.9.0

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Release Notes

johnpbloch/wordpress

v5.9.0

Compare Source

v5.8.3

Compare Source

v5.8.2

Compare Source

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Configuration

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