Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/meson/versions.

These checks were done:

- built on NixOS
- /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0/bin/meson passed the binary check.
- Warning: no invocation of /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0/bin/mesonconf had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0/bin/mesonintrospect had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0/bin/mesontest had a zero exit code or showed the expected version
- /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0/bin/wraptool passed the binary check.
- 2 of 5 passed binary check by having a zero exit code.
- 1 of 5 passed binary check by having the new version present in output.
- found 0.47.0 with grep in /nix/store/r959bxd7pgfd9crp3fagw4x6j6pl105l-meson-0.47.0
- directory tree listing: https://gist.github.com/921992f726772b72a0e2ccd9591141b1
- du listing: https://gist.github.com/22365bf0c1a1ab300e07e36d205c7eb7

meson: 0.46.1 -> 0.47.0