Ensure old ActiveSupport fix works in all versions
Ensure old ActiveSupport fix works in all versions

ActiveSupport 3.2.18 renamed `ForMinitest` to `ForMiniTest` which breaks this
monkey patch. Aliasing the old `ForMinitest` to `ForMiniTest` before fixing the
problem corrects this issue.

This has been tested on ActiveSupport 3.2.17, 3.2.18 and 3.2.21 (the version on
which I originally encountered the problem).

gavinlaking/minitest-reporters,paddor/minitest-reporters,dillonkearns/minitest-reporters,andruby/minitest-reporters,paddor/minitest-reporters,thinkthroughmath/minitest-reporters,kern/minitest-reporters,kern/minitest-reporters,dillonkearns/minitest-reporters,skuroki/minitest-reporters,gavinlaking/minitest-reporters,tjschuck/minitest-reporters,skuroki/minitest-reporters,tjschuck/minitest-reporters,vadviktor/minitest-reporters,DarynHolmes/minitest-reporters,barkingiguana/minitest-reporters,vadviktor/minitest-reporters,DarynHolmes/minitest-reporters,thinkthroughmath/minitest-reporters,barkingiguana/minitest-reporters