Log Message:
sayaka: update to 3.7.1.

pkgsrc changes:
- workaround build errors of gcc7 on netbsd-9
- fix a problem that webp images with alpha channel are not shown properly

Upstream changes:

* 3.7.1 (2023/10/09)
 - fix failures on drawing WebP images in some cases
 - fix infinite loop on emoji notification messages

* 3.7.0 (2023/10/09)
 - start support of Misskey
 - drop functions to connect to Twitter
 - drop --filter, --home, --no-rest, --post, and --token options
 - add --twitter, --misskey, and --local options
 - temporarily drop --ngword-* and --show-ng options
 - rename --black/--white options to --dark/--light