Update versions.json

Author: thomashoneyman

dist/versions.json

@@ -1 +1 @@
-{"purs":"0.13.8","spago":"0.15.3","purty":"6.2.0","zephyr":"0.3.2"}
+{"purs":"0.13.8","spago":"0.15.2","purty":"6.2.0","zephyr":"0.3.2"}