chore: restore compiler's coverage reporting

This commit restores proper reporting of compiler's test coverage that got broken via 71a467d7c67dcb909220db7a9b8bca3868119378. The culprit is this line: https://github.com/ariatemplates/hashspace/commit/71a467d7c67dcb909220db7a9b8bca3868119378#diff-74467b60c03e153dfefce7b39243fd95R6 which was causing node to load compiler's modules. This was preventing blanket.js from properly instrumenting code as it instruments things by "taking over" node's `require()` and processing code on the fly.