fix coerce test suite

Author: joaomoreno

test/coerce.js

@@ -114,5 +114,5 @@ test('\ncoerce tests', function (t) {
   t.same(valid(coerce('42.6.7.9.3-alpha')), '42.6.7')
   t.same(valid(coerce('v2')), '2.0.0')
 
-  t.done()
+  t.end()
 })