:art: Set severity and options at top of function
:art: Set severity and options at top of function

Checking `typeof fullRule` 1 time up front instead of 3-4 times
throughout the function seems cleaner.

ngryman/sass-lint,sasstools/sass-lint,sasstools/sass-lint,bgriffith/sass-lint,srowhani/sass-lint,srowhani/sass-lint,flacerdk/sass-lint,DanPurdy/sass-lint,sktt/sass-lint