message: remove zero area shape
diff: @@ -17,7 +17,7 @@ describe('jscad', function () {
  var { CAG } = require('@jscad/csg');
  var model = {};
  - for (let i = 0; i < 10; i++) {
  + for (let i = 1; i < 10; i++) {
  makerjs.$(new makerjs.models.Square(i * 10))
  .center()
  .addTo(model);
  