Fixing Scala download URL, bumping version to 2.9.3
Fixing Scala download URL, bumping version to 2.9.3

Closes #177.

Signed-off-by: Xiyue Deng <4900478725231961caf32165c870e05cea7389d8@gmail.com>

DomT4/homebrew-versions,UniqMartin/homebrew-versions,Ashton-W/homebrew-versions,heuermh/homebrew-versions,coeligena/homebrew-verscustomized,jimhe/homebrew-versions