Merge pull request purescript-node#26 from purescript-node/compiler/0.12

Compiler/0.12

add unpipe and destroy functions (purescript-node#21)

Merge pull request purescript-node#18 from matthewleon/event-listen-t…

…ypes

loosen typing of two event listener functions

Merge pull request purescript-node#14 from felixSchl/feature/onFinish

Add `onFinish` event

Merge pull request purescript-node#13 from anilanar/ps-0.11

update for purescript 0.11

Merge pull request purescript-node#11 from purescript-node/build

Update build