HGKeeper

Update the minimum meson to 0.56.0

2021-08-03, Gary Kramlich

13ee9f88fa95

Update the minimum meson to 0.56.0

Testing Done:
ran `meson --wipe` and `ninja` and verified there were no warnings.

Reviewed at https://reviews.imfreedom.org/r/867/

# h1

## h2

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###### h6

plain *emphasis* _emphasis_ ~~**strong**~~ __strong__ `code` plain

[Test link](https://pidgin.im)

`code`

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talkatu/talkatu