Logical operators OR/AND not working

[yzx396]

The following are supposed to be working according to README.md but not. @nikunjy

parser.Evaluate("x eq 1 OR x eq 2", map[string]interface{}{"x": 1})

It would be nice to support || and && as equivalent of and and or.

[nikunjy]

Hey @yangzhaox yea I think I have that wrong only or and and are supported not the upper caps.
I will try to extend if I get some time today.