colClasses=logical is no longer working

[st-pasha]

This appears to be a very similar issue to #2251, which hopefully means that a similar solution can be applied.

> fread("A,B\n1,TRUE", colClasses=c("integer", "logical"))
Error in fread("A,B\n1,TRUE", colClasses = c("integer", "logical")) : 
  Attempt to override column 2 <<B>> of inherent type 'bool8' down to 'bool8' which will lose accuracy. If this was intended, please coerce to the lower type afterwards. Only overrides to a higher type are permitted.

[mattdowle]

I'm not sure when this was fixed, but it's fixed now. I'll add a test.

> fread("A,B\n1,TRUE", colClasses=c("integer", "logical"))
       A      B
   <int> <lgcl>
1:     1   TRUE