Move `isArray` check higher up in `lodash` function.
Use available `value` var in `_.difference`.
Remove less useful benchmarks from perf.js.
Fix `_.template` benchmarks.
Add `isIndex` helper.
Reorganize wrappers, adding `SetCache` as a hybrid cache combining ES6 Set and object lookups,
Fix failing tests in Node.
Remove Android 4.0 from Sauce until their issue is resolved.
Rename `MemCache` to `MapCache`.
Rebuild dist.
Cleanup `baseDifference`.
Avoid JIT bug in Safari 8.
Minor updates to the documentation

[ci skip]