chore: move from luacheck to selene

.luacheckrc

@@ -1,16 +0,0 @@
--- Global objects
-globals = {
-  "vim",
-  "bit",
-}
-
--- Rerun tests only if their modification time changed
-cache = true
-
--- Don't report unused self arguments of methods
-self = false
-
-ignore = {
-  "631", -- max_line_length
-  "212/_.*", -- unused argument, for vars with "_" prefix
-}

neovim.yml

@@ -0,0 +1,6 @@
+---
+base: lua51
+
+globals:
+  vim:
+    any: true

selene.toml

@@ -0,0 +1,8 @@
+std = "neovim"
+
+[rules]
+global_usage = "allow"
+if_same_then_else = "allow"
+incorrect_standard_library_use = "allow"
+mixed_table = "allow"
+multiple_statements = "allow"