fix(logger): Fix bad argument #2 to strsplit (#125)

Only Loki logging was affected. When no tags were given and the source is console the convertDDTagsToKVP break because of the nil value.

imports/logger/server.lua

@@ -143,7 +143,7 @@ if service == 'loki' then
         local values = {message = message}
 
         -- Format the args into strings
-        local tags = formatTags(source, ... and string.strjoin(',', string.tostringall(...)) or nil)
+        local tags = formatTags(source, ... and string.strjoin(',', string.tostringall(...)) or {})
         local tagsTable = convertDDTagsToKVP(tags)
 
         -- Concatenates tags kvp table to the values table