4.17.15
Remove unneeded capture phase param from `addEventListener`.
Fix amd test fails.
Remove test/asset/test-ui.js use from test/fp.html.
Replace `Object.create` mock with `undefined` to hit more bizarro code paths.
Use `lodash` in test/remove.js.
Update Safari in sauce.
Lint nits.
Fix test bootstrap for core build.
Avoid leaked var in `_.before` test.