Add a changelog entry about mathn compatibility.
Add a changelog entry about mathn compatibility.

DanteKaris/sass,Galactix/sass,zaru/sass,tangposmarvin/sass,OrenBochman/sass,briangonzalez/sass,MetaAshley/sass,nickg33/sass,srawlins/sass,liquidmetal/sass,cmpereirasi/sass,cmpereirasi/sass,StephanieMak/sass,jaroot32/sass,antonifs/sass,Nzaga/sass,saper/sass,tenderlove/sass,rammy7219/sass,DanteKaris/sass,dylannnn/sass,OrenBochman/sass,amitsuroliya/sass,Ahnita/sass,liquidmetal/sass,PMArtz92/sass,ridixcr/sass,Andrey-Pavlov/sass,xzyfer/sass,schneems/sass,Anshdesire/sass,srinivashappy/sass,Iamronan/sass,ridixcr/sass,oss-practice/sass,saper/sass,modulexcite/sass,chriseppstein/sass,lmetla/sass,rammy7219/sass,HugoRLopes/sass,JuanitoFatas/sass,StephanieMak/sass,dylannnn/sass,MetaAshley/sass,modulexcite/sass,Anshdesire/sass,Iamronan/sass,Galactix/sass,stewx/sass,Andrey-Pavlov/sass,Ahnita/sass,jaroot32/sass,baiyanghese/sass,lmetla/sass,hcatlin/sass,schneems/sass,HugoRLopes/sass,hcatlin/sass,srawlins/sass,srinivashappy/sass,14113/sass,stewx/sass,PMArtz92/sass,Industrys/sass,xzyfer/sass,tangposmarvin/sass,nickg33/sass,danielfein/sass,antonifs/sass,nicklima/sass,askl56/sass,Industrys/sass,danielfein/sass,zaru/sass,nicklima/sass,amitsuroliya/sass,Nzaga/sass,JuanitoFatas/sass,askl56/sass