Bump mods/basic_materials from `78a9b38` to `cb71366`

Bumps mods/basic_materials from 78a9b38 to cb71366.

Commits

• cb71366 Merge branch 'master' into 'master'
• 23cd94b add luacheck pipeline
• e72665b Merge branch 'italian' into 'master'
• c27117d Italian translation
• 30ffac3 Merge branch 'de' into 'master'
• 84a5f35 Fix German translation
• a79dbde Merge branch 'groups' into 'master'
• fb800f9 Add custom groups
• c49b4f1 Add .luacheckrc
• c539463 add minimum minetest version key for contentdb
• Additional commits viewable in compare view