update luacheck

.github/workflows/luacheck.yml

@@ -1,15 +1,10 @@
 name: luacheck
-
 on: [push, pull_request]
-
 jobs:
   build:
-
     runs-on: ubuntu-latest
-    timeout-minutes: 10
-
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@master
     - name: apt
       run: sudo apt-get install -y luarocks
     - name: luacheck install

.luacheckrc

@@ -4,17 +4,11 @@ globals = {
 }
 
 read_globals = {
-	-- Stdlib
-	string = {fields = {"split", "trim"}},
-	table = {fields = {"copy", "getn"}},
-
 	-- Minetest
 	"minetest",
 	"vector", "ItemStack",
-	"dump", "dump2",
-	"VoxelArea",
 
-	-- deps
+	-- Mod deps
 	"wardzones",
 	"minetestd",
 	"player_monoids"