Update to version v1.1.0

[1.1.0] - 2020-3-9

Added

• Tests for the basic arithmetics and autoMult option
• Tests for options.functions
• Preparing input before parsing, enabling parsing when the passed expression has some unimportant groups such as as{da } ^{13}{/6} -> as da ^{13} /6
• Types "prod", "sqrt" to Node types.

Changed

• the error message when parsing \dfhgw, which is not defined, the parser throw "undefined control sequence dfhgw";
• Sqrt now is parsed with type = "sqrt" not "function" as before.

Fix

• \lef( [expression] \right): an error was thrown when we try to parse such an expression, it considered right as control sequence name
• Make the argument for BlockParentheses instance of Array