Bump popper.js from 1.16.1 to 2.0.0-next.4

[dependabot-preview]

Bumps popper.js from 1.16.1 to 2.0.0-next.4.

Release notes

Sourced from popper.js's releases.

v2.0.0-alpha.2

The second alpha of Popper 2 is here! From now on we'll try to keep track of the changes using the GitHub releases.

In this version:

• feat: point to popper-lite for default ESM import;
• fix: address Firefox quirk (#837);
• feat: preventOverflow#tetherOffset and flip#checkVariation;

Breaking changes:

The default library export for ESM consumers is now popper-lite.js, this version includes the most basic modifiers needed to have a working popper. If you want to take advantage of the super-thin Popper core, you can still import from @popperjs/core/lib/popper-base.js to reproduce the previous behavior (no modifiers).

The preventOverflow and flip modifiers API slightly changed, preventOverflow#tether is now a boolean, and you are able to further configure it by defining the thetherOffset option.

The flip modifier has now a new option, checkVariation, that will attempt to flip the placement's variation (-start, -end) in order to keep the popper within its boundaries.

Commits

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