Add config file for Luacheck to lint Lua code

Author: alerque

.luacheckrc

@@ -0,0 +1,27 @@
+std = "lua54"
+
+max_line_length = false
+
+files["**/test/lua/**"] = {
+  std = "+pandoc_filter"
+}
+
+files["**/test/*.lua"] = {
+  std = "+pandoc_custom"
+}
+
+files["data/**"] = {
+  std = "+pandoc_custom"
+}
+
+files["tools/**"] = {
+  std = "+pandoc_custom"
+}
+
+files["man/**"] = {
+  std = "+pandoc_script"
+}
+
+exclude_files = {
+  ".stack-work"
+}