Set min required version of B::Utils to 0.27, as that release fixes the remaining failing tests.
Hacked const_sv() to cope with the change in OP_METHOD_NAMED that happened at 5.21.5 (or possibly an earlier 5.21.*).
Changes for version 0.35_02 - 2015-06-15
Sigh, forgot to add B::Utils to PREREQ_PM
Changes for version 0.35_01 - 2015-06-15
Dropped B::BUtils in favour of using the standard B::Utils. subroutines_called() stopped working correctly for standard function calls, identifying them as calls via symbolic references. Fixed that.