Ckeditor5: Remove src/lib/lodash in favor of lodash-es package. Update lodash to version 4.17.10

[ma2ciek]

Until we find out a better solution for lodash, we can update this library to the latest version to solve a few problems.

[ma2ciek]

lodash-cli, which we use: https://github.com/ckeditor/ckeditor5-utils/blob/98508b0c15044ef870e2301edc1a0f2f41a8aeb1/package.json#L22 is achieved at version 4.17.5 (see https://github.com/lodash-archive/lodash-cli), which still has the problem in the debounce function's implementation - https://github.com/lodash/lodash/blob/4.17.5-es/debounce.js.

I'll remove this dep and will update the library directly from the GH (https://github.com/lodash/lodash/tree/es).

[oskarwrobel]

4.17.10-es branch is available on npm https://www.npmjs.com/package/lodash-es. Just saying ;)

[oskarwrobel]

Many import paths to rename, but it shouldn't be a problem.

[ma2ciek]

I've checked and all tests pass with the [email protected].

What's more, we have a small boost in the weights of builds, e.g the size of ckeditor5-build-classic is decreased by 5kb.

4.17.10-es branch is available on npm https://www.npmjs.com/package/lodash-es

Thanks, I've forgotten about that package :)

[pjasiun]

Agree it might be worth to use 4.17.10-es. It should make the integration much simpler.

[ma2ciek]

I'll start changing these lodash imports to the import { x } from 'lodash-es'. I completely forgot that with webapack@4 and this package marked as pure module it's the preferred way of importing lodash.

Ref https://twitter.com/jdalton/status/893109185264500737?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E893109185264500737&ref_url=https%3A%2F%2Fmedium.com%2Fmedia%2Ffa597f1dc9b4c8d5fd8ff603bd007369%3FpostId%3D2734fa13b5cd.

So we should gain even more after this change.

[ma2ciek]

The builds weight the same as before (5kb less than now), but the import syntax is much nicer. And for some integration built from the source, it should save a few bytes. Lerna perfectly flattens all lodash-es to only one node_modules/lodash-es at the top level.

As removing the lodash from the ckeditor5-utils would result in BC, we can change all imports to new ones, but preserve old lodash files under src/lib/lodash until a new major release. WDYT?

[pjasiun]

I do not think we should support 2 versions of lodash. I think that we should do the major release of CKEditor 5 utils because of this change.