[planet-announce] Updated PLaneT package: dyoo/whalesong.plt for 4.x

This announces the availability of an updated package from PLaneT:

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Name:            whalesong.plt
Package version: 1.19
Owner:           dyoo


Package Description
A Racket to JavaScript compiler
Release Notes

Preliminary support for Racket 5.3.

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Go to 

http://planet.racket-lang.org/display.ss?package=whalesong.plt&owner=dyoo

for more information.