brianloveswords/altcaps — pull request #1 by mathiasbynens (2014-11-13 16:41:40+00:00)
Title: Use swapcase for Unicode-aware case swapping

Before:

$ echo 'aaaᾷᾷᾷ' | node index.js
aAaΑ͂ΙᾷΑ͂Ι

After:

$ echo 'aaaᾷᾷᾷ' | node index.js
aAaᾶιᾷᾶι