Implement the simplified testable module pattern.
Implement the simplified testable module pattern.

Read more about the pattern here: https://markus.oberlehner.net/blog/2017/02/the-testable-module-pattern/

maoberlehner/node-sass-magic-importer,maoberlehner/node-sass-magic-importer,maoberlehner/node-sass-magic-importer