Require closer-mop 1.0.0 to work around ASDF problem in more-conditions.asd

fixes #2

The problem is that the previous dependency specification

  (:version :closer-mop "0.61")

means "at least version 0.61" in recent versions of ASDF, but "at least
0.61 and less than 1.0" in older versions of ASDF. Specifying the
dependency on version 1.0.0 works with both ASDF behaviors. The downside
is that we do not actually need "at least 1.0.0".

* more-conditions.asd (system more-conditions): changed version of
  closer-mop dependency 0.61 -> 1.0.0

Reported-by: Anton Vodonosov