v0.5.0

• implement various functions (with_entries, from_entries, leaf_paths, contains, inside, split, stream, fromstream, truncate_stream, bsearch, path, paths, map_values, del, delpaths, getpath, gmtime, localtime, mktime, strftime, strflocaltime, strptime, todate, fromdate, now, match, test, capture, scan, splits, sub, gsub, debug, stderr)
• implement assignment operator (=)
• implement modify operator (|=)
• implement update operators (+=, -=, *=, /=, %=, //=)
• implement destructuring alternative operator (?//)
• allow function declaration inside query
• implement -f flag for loading query from file
• improve error message for parsing multiple line query